diff --git a/LICENSE b/LICENSE
deleted file mode 100644
index e62ec04c..00000000
--- a/LICENSE
+++ /dev/null
@@ -1,674 +0,0 @@
-GNU GENERAL PUBLIC LICENSE
-                       Version 3, 29 June 2007
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-  IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
-WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
-THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
-GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
-USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
-DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
-PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
-EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
-SUCH DAMAGES.
-
-  17. Interpretation of Sections 15 and 16.
-
-  If the disclaimer of warranty and limitation of liability provided
-above cannot be given local legal effect according to their terms,
-reviewing courts shall apply local law that most closely approximates
-an absolute waiver of all civil liability in connection with the
-Program, unless a warranty or assumption of liability accompanies a
-copy of the Program in return for a fee.
-
-                     END OF TERMS AND CONDITIONS
-
-            How to Apply These Terms to Your New Programs
-
-  If you develop a new program, and you want it to be of the greatest
-possible use to the public, the best way to achieve this is to make it
-free software which everyone can redistribute and change under these terms.
-
-  To do so, attach the following notices to the program.  It is safest
-to attach them to the start of each source file to most effectively
-state the exclusion of warranty; and each file should have at least
-the "copyright" line and a pointer to where the full notice is found.
-
-    <one line to give the program's name and a brief idea of what it does.>
-    Copyright (C) <year>  <name of author>
-
-    This program is free software: you can redistribute it and/or modify
-    it under the terms of the GNU General Public License as published by
-    the Free Software Foundation, either version 3 of the License, or
-    (at your option) any later version.
-
-    This program is distributed in the hope that it will be useful,
-    but WITHOUT ANY WARRANTY; without even the implied warranty of
-    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-    GNU General Public License for more details.
-
-    You should have received a copy of the GNU General Public License
-    along with this program.  If not, see <https://www.gnu.org/licenses/>.
-
-Also add information on how to contact you by electronic and paper mail.
-
-  If the program does terminal interaction, make it output a short
-notice like this when it starts in an interactive mode:
-
-    <program>  Copyright (C) <year>  <name of author>
-    This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
-    This is free software, and you are welcome to redistribute it
-    under certain conditions; type `show c' for details.
-
-The hypothetical commands `show w' and `show c' should show the appropriate
-parts of the General Public License.  Of course, your program's commands
-might be different; for a GUI interface, you would use an "about box".
-
-  You should also get your employer (if you work as a programmer) or school,
-if any, to sign a "copyright disclaimer" for the program, if necessary.
-For more information on this, and how to apply and follow the GNU GPL, see
-<https://www.gnu.org/licenses/>.
-
-  The GNU General Public License does not permit incorporating your program
-into proprietary programs.  If your program is a subroutine library, you
-may consider it more useful to permit linking proprietary applications with
-the library.  If this is what you want to do, use the GNU Lesser General
-Public License instead of this License.  But first, please read
-<https://www.gnu.org/licenses/why-not-lgpl.html>.
diff --git a/docs/make.jl b/docs/make.jl
index 44fb1821..b656a5b5 100644
--- a/docs/make.jl
+++ b/docs/make.jl
@@ -9,20 +9,21 @@ makedocs(
   [
     "Home" => "index.md",
     "Quickstart Guide" => "quickstart.md",
-    "Manual" => ["man/toc.md",
-                 "man/definitions.md", 
-                 "man/descriptor.md", 
-                 "man/tps.md",
-                 "man/complextps.md",
-                 "man/varsparams.md",
-                 "man/monoindex.md",
-                 "man/mono.md",
-                 "man/gjh.md",
-                 "man/slice.md",
-                 "man/methods.md",
-                 "man/fastgtpsa.md",
-                 "man/io.md",
-                 "man/all.md"],
+    "Manual" => ["man/a_toc.md",
+                 "man/b_definitions.md", 
+                 "man/c_descriptor.md", 
+                 "man/d_tps.md",
+                 "man/e_complextps.md",
+                 "man/f_varsparams.md",
+                 "man/g_monoindex.md",
+                 "man/h_mono.md",
+                 "man/i_gjh.md",
+                 "man/j_slice.md",
+                 "man/k_methods.md",
+                 "man/l_fastgtpsa.md",
+                 "man/m_io.md",
+                 "man/n_global.md",
+                 "man/o_all.md"],
     "For Developers" => "devel.md"
   ]
 )
diff --git a/docs/src/man/toc.md b/docs/src/man/a_toc.md
similarity index 100%
rename from docs/src/man/toc.md
rename to docs/src/man/a_toc.md
diff --git a/docs/src/man/b_definitions.md b/docs/src/man/b_definitions.md
new file mode 100644
index 00000000..1287f3ac
--- /dev/null
+++ b/docs/src/man/b_definitions.md
@@ -0,0 +1,37 @@
+# [Definitions](@id definitions)
+*This section is incomplete, and will be expanded in the near future*
+
+## [Custom Truncation Orders](@id cto)
+GTPSA allows for significant customization in the truncation of specific variables within  a monomial of the truncated power series (TPS). One can specify individually the truncation orders for each variable in a truncated power series, as well as the maximum truncation order for an entire monomial in the TPS. This is best shown with an example:
+
+Suppose we'd like to express a function ``f(x_1,x_2)`` as a truncated power series, and keep only terms that are up to 1st-order in ``x_1`` but up to 2nd order in ``x_2``; basically, we should not have any monomials where ``x_1`` has an exponent > 1, nor any monomials where ``x_2`` has an exponent > 2. GTPSA allows one to select the **individual truncation orders** for variables in a monomial in this manner. The next question to consider is the **maximum truncation order** for the entire monomial; in the above example, note that the 3rd-order term ``x_1x_2^2`` follows the rules we layed out so far. But what if we'd also like to truncate all monomials with order 3 and above, and not allow this monomial? This can be achieved by setting the maximum truncation order equal to 2. When defining a GTPSA, the user must always specify the maximum truncation order, which when specifying individual truncation orders must lie within the range ``[\max{(\textrm{individual truncation orders})}, \sum{(\textrm{individual truncation orders})}]``. If individual truncation orders are not specified, then they are automatically set to the maximum truncation order.
+
+**Example: allowed monomials for ``f(x_1,x_2)`` with individual variable truncation orders [1,2] and different maximum truncation orders:**
+
+| Exponents | Max Order = 2 | Max Order = 3 |
+| :-------: | :-----------: | :-----------: |
+|  ``1\quad 0``  |       ✅      |       ✅      |
+|  ``0\quad 1``  |       ✅      |       ✅      |
+|  ``2\quad 0``  |       ❌      |       ❌      |
+|  ``1\quad 1``  |       ✅      |       ✅      |
+|  ``0\quad 2``  |       ✅      |       ✅      |
+|  ``3\quad 0``  |       ❌      |       ❌      |
+|  ``2\quad 1``  |       ❌      |       ❌      |
+|  ``1\quad 2``  |       ❌      |       ✅      |
+|  ``0\quad 3``  |       ❌      |       ❌      |
+
+
+## Parameters
+GTPSA allows one to explicitly distinguish between *variables* and *parameters*. Generally, a variable would be a dependent variable in a differential equation, and a parameter would be a variation in something defining or influencing the system (for example, in a harmonic oscillator the restoring constant ``k`` would be a parameter). Individual truncation orders can be specified for the parameters in the same way as [described for the variables](@ref cto), however there is a special extra truncation order the can be specified for solely the parameters part of the monomial, referred to as the **parameter order**. The parameter order defines the truncation order for only the parameters part of a monomial. 
+
+**Example: allowed monomials for ``f(x_1,k_1,k_2)`` (one variable, two parameters) with individual variable truncation order [1], individual parameter truncation orders [1,1], maximum order = 3, and different parameter orders:**
+
+| Exponents | Parameter Order = 1 | Parameter Order = 2 |
+| :-------: | :-----------: | :-----------: |
+|  ``0\quad \| \quad 1 \quad 0``  |       ✅      |       ✅      |
+|  ``0\quad \| \quad 0 \quad 1``  |       ✅      |       ✅      |
+|  ``0\quad \| \quad 1 \quad 1``  |       ❌      |       ✅      |
+|  ``1\quad \| \quad 1 \quad 0``  |       ✅      |       ✅      |
+|  ``1\quad \| \quad 0 \quad 1``  |       ✅      |       ✅      |
+|  ``1\quad \| \quad 1 \quad 1``  |       ❌      |       ✅      |
+(Note: many monomials are excluded for brevity in the above table)
diff --git a/docs/src/man/c_descriptor.md b/docs/src/man/c_descriptor.md
new file mode 100644
index 00000000..8eb95378
--- /dev/null
+++ b/docs/src/man/c_descriptor.md
@@ -0,0 +1,40 @@
+# [`Descriptor`](@id descriptor)
+*Defines the number of variables, number of parameters, and order(s) for each in the GTPSA*
+## Syntax
+```
+d = Descriptor(num_vars, max_order)     
+d = Descriptor(vars_orders, max_order)
+d = Descriptor(num_vars, max_order, num_params, param_order)   
+d = Descriptor(vars_orders, max_order, params_orders, param_order)
+
+GTPSA.desc_current = d
+```
+
+## Description
+`d = Descriptor(num_vars, max_order)` defines a GTPSA `Descriptor` with `num_vars` variables and a maximum truncation order `max_order`
+
+`d = Descriptor(vars_orders, max_order)` defines a GTPSA `Descriptor` with `length(var_orders)` variables each having individual truncation orders specified in the `var_orders` vector, and a maximum truncation order `max_order` for the entire monomial
+
+`d = Descriptor(num_vars, max_order, num_params, param_order)` defines a GTPSA `Descriptor` with `num_vars` variables and `num_params` parameters. The parameters part of a monomial is truncated at `param_order`, and the entire monomial is truncated at `max_order` (so `param_order <= max_order`)
+
+`d = Descriptor(vars_orders, max_order, params_orders, param_order)` defines a GTPSA `Descriptor` with `length(var_orders)` variables each having individual truncation orders specified in the `vars_orders` vector, and `length(param_orders)` parameters each having individual truncation orders specified in the `params_orders` vector. The parameters part of the monomial is truncated at `param_order`,  and the entire monomial is truncated at `max_order` (so `param_order <= max_order`)
+
+-----
+
+`GTPSA.desc_current` is a global variable that is set each time a user creates a new `Descriptor`, and can also be set manually by a user. `GTPSA.desc_current` defines the `Descriptor` to use when that information is not explicitly (or implicitly in a TPS copy constructor) available, e.g. when calling `TPS(a)` where `a` is not a `TPS`. This also allows one to use general `Number` commands like `convert(TPS, a)` and `zeros(TPS, 6)`.
+
+
+## Examples
+```@repl desc
+using GTPSA #hide
+d1 = Descriptor(2, 10)         
+d2 = Descriptor([1, 2, 3], 5)     
+d3 = Descriptor(3, 4, 1, 2)    
+d4 = Descriptor([6, 5], 8, [4, 3], 7)   
+GTPSA.desc_current = d1
+```
+
+## Documentation
+```@docs
+Descriptor
+```
\ No newline at end of file
diff --git a/docs/src/man/tps.md b/docs/src/man/d_tps.md
similarity index 100%
rename from docs/src/man/tps.md
rename to docs/src/man/d_tps.md
diff --git a/docs/src/man/definitions.md b/docs/src/man/definitions.md
deleted file mode 100644
index 88f72348..00000000
--- a/docs/src/man/definitions.md
+++ /dev/null
@@ -1,4 +0,0 @@
-# [Definitions](@id definitions)
-*This section is incomplete, and will be expanded in the near future*
-
-GTPSA allows for explicitly distinguishing between state *variables* and external *parameters*. For example, suppose you have defined the evolution of some initial state ``x_i`` of a dynamical system to a final state ``x_f`` as ``x_f = \mathcal{M}(x_i,k)``, where ``k`` is some external parameter. When ``\mathcal{M}`` is expanded in powers of ``\Delta x_i`` and ``\Delta k``, distinguishing between the state variable ``x`` and parameter ``k`` can significantly simplify analyses of the system.  In the context of `GTPSA.jl`, we refer to ``\mathcal{M}(x_i,k)`` as a *GTPSA map*.
\ No newline at end of file
diff --git a/docs/src/man/descriptor.md b/docs/src/man/descriptor.md
deleted file mode 100644
index 8eeb0eaf..00000000
--- a/docs/src/man/descriptor.md
+++ /dev/null
@@ -1,40 +0,0 @@
-# [`Descriptor`](@id descriptor)
-*Defines the number of variables, number of parameters, and order(s) for each in the GTPSA*
-## Syntax
-```
-d = Descriptor(num_vars, var_order)     
-d = Descriptor(var_orders)
-d = Descriptor(num_vars, var_order, num_params, param_order)   
-d = Descriptor(var_orders, param_orders)  
-
-GTPSA.desc_current = d
-```
-
-## Description
-`d = Descriptor(num_vars, var_order)` defines a GTPSA `Descriptor` with `num_vars` variables all having the same truncation order `var_order`
-
-`d = Descriptor(var_orders)` defines a GTPSA `Descriptor` with `length(var_orders)` variables each having individual truncation orders specified in the `var_orders` vector
-
-`d = Descriptor(num_vars, var_order, num_params, param_order)` defines a GTPSA `Descriptor` with `num_vars` variables all having the same truncation order `var_order`, and `num_params` parameters all having the same truncation order `param_order`
-
-`d = Descriptor(var_orders, param_orders)` defines a GTPSA `Descriptor` with `length(var_orders)` variables each having individual truncation orders specified in the `var_orders` vector, and `length(param_orders)` parameters each having individual truncation orders specified in the `param_orders` vector
-
------
-
-`GTPSA.desc_current` is a global variable that is set each time a user creates a new `Descriptor`, and can also be set manually by a user. `GTPSA.desc_current` defines the `Descriptor` to use when that information is not explicitly (or implicitly in a TPS copy constructor) available, e.g. when calling `TPS(a)` where `a` is not a `TPS`. This also allows one to use general `Number` commands like `convert(TPS, a)` and `zeros(TPS, 6)`.
-
-
-## Examples
-```@repl desc
-using GTPSA #hide
-d1 = Descriptor(2, 10)         
-d2 = Descriptor([1, 2, 3])     
-d3 = Descriptor(3, 4, 1, 2)    
-d4 = Descriptor([6, 5], [4])   
-GTPSA.desc_current = d1
-```
-
-## Documentation
-```@docs
-Descriptor
-```
\ No newline at end of file
diff --git a/docs/src/man/complextps.md b/docs/src/man/e_complextps.md
similarity index 100%
rename from docs/src/man/complextps.md
rename to docs/src/man/e_complextps.md
diff --git a/docs/src/man/varsparams.md b/docs/src/man/f_varsparams.md
similarity index 100%
rename from docs/src/man/varsparams.md
rename to docs/src/man/f_varsparams.md
diff --git a/docs/src/man/monoindex.md b/docs/src/man/g_monoindex.md
similarity index 100%
rename from docs/src/man/monoindex.md
rename to docs/src/man/g_monoindex.md
diff --git a/docs/src/man/mono.md b/docs/src/man/h_mono.md
similarity index 100%
rename from docs/src/man/mono.md
rename to docs/src/man/h_mono.md
diff --git a/docs/src/man/gjh.md b/docs/src/man/i_gjh.md
similarity index 100%
rename from docs/src/man/gjh.md
rename to docs/src/man/i_gjh.md
diff --git a/docs/src/man/slice.md b/docs/src/man/j_slice.md
similarity index 100%
rename from docs/src/man/slice.md
rename to docs/src/man/j_slice.md
diff --git a/docs/src/man/methods.md b/docs/src/man/k_methods.md
similarity index 100%
rename from docs/src/man/methods.md
rename to docs/src/man/k_methods.md
diff --git a/docs/src/man/fastgtpsa.md b/docs/src/man/l_fastgtpsa.md
similarity index 100%
rename from docs/src/man/fastgtpsa.md
rename to docs/src/man/l_fastgtpsa.md
diff --git a/docs/src/man/io.md b/docs/src/man/m_io.md
similarity index 100%
rename from docs/src/man/io.md
rename to docs/src/man/m_io.md
diff --git a/docs/src/man/n_global.md b/docs/src/man/n_global.md
new file mode 100644
index 00000000..27e7a9eb
--- /dev/null
+++ b/docs/src/man/n_global.md
@@ -0,0 +1,34 @@
+# [Global Variables] (@id global)
+The following non-constant global variables can be set:
+
+```julia
+desc_current::Descriptor     # Current Descriptor to use
+show_eps::Float64 =  0.0     # Print epsilon
+show_sparse::Bool = false    # Use sparse monomial print
+show_header::Bool = false    # Print a header above each TPS
+```
+
+**`desc_current`** defines the `Descriptor` to use when that information is not explicitly (or implicitly in a TPS copy constructor) available, e.g. when calling `TPS(a)` where `a` is not a `TPS`. This also allows one to use general `Number` commands like `convert(TPS, a)` and `zeros(TPS, 6)` 
+
+**`show_eps`** defines the value below which the absolute value of a monomial coefficient is NOT printed
+
+**`show_sparse`** specifies whether the sparse monomial format is used for printing. This is useful for GTPSAs containing a large number of variables and parameters
+
+**`show_header`** specifies whether or not to print the GTPSA `Descriptor` information above each TPS output
+
+-----
+
+Global variables can be get/set using either the standard syntax (e.g. `GTPSA.show_header = true`), or using the helper functions `getGTPSA` and `setGTPSA!`.
+
+## Examples
+
+```@repl
+using GTPSA; GTPSA.show_sparse = false; GTPSA.show_header=false; #hide
+d1 = Descriptor(1, 6);
+x = vars()
+GTPSA.show_sparse = true;
+x
+setGTPSA!("show_sparse", false);
+getGTPSA("show_sparse")
+x
+```
diff --git a/docs/src/man/all.md b/docs/src/man/o_all.md
similarity index 100%
rename from docs/src/man/all.md
rename to docs/src/man/o_all.md
diff --git a/docs/src/quickstart.md b/docs/src/quickstart.md
index 4a294e20..f6e5bad0 100644
--- a/docs/src/quickstart.md
+++ b/docs/src/quickstart.md
@@ -4,21 +4,21 @@ A `Descriptor` defines all information about the GTPSA, including the number of
 
 ```@example desc
 using GTPSA #hide
-# Descriptor for 2 variables with max order 10 for each
+# 2 variables with max truncation order 10
 d1 = Descriptor(2, 10)     
 ```
 
 ```@example desc
-# Descriptor for 3 variables with orders 1, 2, 3 respectively
-d2 = Descriptor([1, 2, 3])
+# 3 variables with individual truncation orders 1, 2, 3 and max truncation order 6
+d2 = Descriptor([1, 2, 3], 6)
 ```
 
 ## Calculating a TPS
-After defining a `Descriptor` for the TPSA, the variables (which themselves are represented as `TPS`s) can be obtained using `vars` or `complexvars`. For example, to calculate the Taylor series for ``f(x_1,x_2) = \cos{(x_1)} + \sqrt{1+x_2}`` to 4th order in ``x_1`` and but only 1st order in ``x_2``:
+After defining a `Descriptor` for the TPSA, the variables (which themselves are represented as `TPS`s) can be obtained using `vars` or `complexvars`. For example, to calculate the Taylor series for ``f(x_1,x_2) = \cos{(x_1)} + \sqrt{1+x_2}`` to 4th order in ``x_1`` and but only 1st order in ``x_2`` (up to maximally 1 + 4 = 5th order):
 
 ```@example 1
-using GTPSA #hide
-d = Descriptor([4, 1]);
+using GTPSA; GTPSA.show_header=false; GTPSA.show_sparse=false;#hide
+d = Descriptor([4, 1], 5);
 
 # Returns a Vector of each variable as a TPS
 x = vars(d) 
@@ -35,7 +35,7 @@ A blank `TPS` or `ComplexTPS`, with all coefficients equal to zero, can be creat
 When a TPS contains a lot of variables, the default output showing each variable exponent can be larger than the screen can show. A global variable `GTPSA.show_sparse`, which is by default set to `false`, can be set to `true` to instead show each specific monomial instead of the exponents for each variable:
 
 ```@example
-using GTPSA #hide
+using GTPSA; GTPSA.show_header=false; GTPSA.show_sparse=false;#hide
 d = Descriptor(10, 10);
 x = vars(d);
 
@@ -60,7 +60,7 @@ Individual monomial coefficients in a TPS `t` can be get/set with two methods of
 These two methods of indexing are best shown with an example:
 
 ```@example
-using GTPSA; GTPSA.show_sparse=false; #hide
+using GTPSA; GTPSA.show_header=false; GTPSA.show_sparse=false;#hide
 # Example of indexing by order -----------
 d = Descriptor(3, 10);
 t = TPS(use=d); # Create zero TPS based on d
@@ -75,7 +75,7 @@ print(t)
 ```
 
 ```@example 
-using GTPSA #hide
+using GTPSA; GTPSA.show_header=false; GTPSA.show_sparse=false; #hide
 # Example of indexing by sparse monomial -----------
 d = Descriptor(3, 10);
 t = TPS(use=d); # Create zero TPS based on d
@@ -92,7 +92,7 @@ print(t)
 The convenience getters `gradient`, `jacobian`, and `hessian` (as well as their corresponding in-place methods `gradient!`, `jacobian!`, and `hessian!`) are also provided for extracting partial derivatives from a TPS/Vector of TPSs. Note that these functions are not actually calculating anything - at this point the TPS should already have been propagated through the system, and these functions are just extracting the corresponding partial derivatives.
 
 ```@example
-using GTPSA #hide
+using GTPSA; GTPSA.show_header=false; GTPSA.show_sparse=false; #hide
 # 2nd Order TPSA with 100 variables
 d = Descriptor(100, 2);
 x = vars(d);
@@ -114,7 +114,7 @@ hessian!(h1, out[1]);
 Parts of a TPS with certain variable orders can be extracted by slicing the TPS. When indexing by order, a colon (`:`) can be used in place for a variable order to include all orders of that variable. If the last specified index is a colon, then the rest of the variable indices are assumed to be colons:
 
 ```@example slice
-using GTPSA;  #hide
+using GTPSA; GTPSA.show_header=false; GTPSA.show_sparse=false; #hide
 d = Descriptor(5, 10);
 x = vars(d);
 
diff --git a/src/GTPSA.jl b/src/GTPSA.jl
index 6b048817..27e70701 100644
--- a/src/GTPSA.jl
+++ b/src/GTPSA.jl
@@ -1,3 +1,679 @@
+#=
+GNU GENERAL PUBLIC LICENSE
+                       Version 3, 29 June 2007
+
+ Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/>
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+                            Preamble
+
+  The GNU General Public License is a free, copyleft license for
+software and other kinds of works.
+
+  The licenses for most software and other practical works are designed
+to take away your freedom to share and change the works.  By contrast,
+the GNU General Public License is intended to guarantee your freedom to
+share and change all versions of a program--to make sure it remains free
+software for all its users.  We, the Free Software Foundation, use the
+GNU General Public License for most of our software; it applies also to
+any other work released this way by its authors.  You can apply it to
+your programs, too.
+
+  When we speak of free software, we are referring to freedom, not
+price.  Our General Public Licenses are designed to make sure that you
+have the freedom to distribute copies of free software (and charge for
+them if you wish), that you receive source code or can get it if you
+want it, that you can change the software or use pieces of it in new
+free programs, and that you know you can do these things.
+
+  To protect your rights, we need to prevent others from denying you
+these rights or asking you to surrender the rights.  Therefore, you have
+certain responsibilities if you distribute copies of the software, or if
+you modify it: responsibilities to respect the freedom of others.
+
+  For example, if you distribute copies of such a program, whether
+gratis or for a fee, you must pass on to the recipients the same
+freedoms that you received.  You must make sure that they, too, receive
+or can get the source code.  And you must show them these terms so they
+know their rights.
+
+  Developers that use the GNU GPL protect your rights with two steps:
+(1) assert copyright on the software, and (2) offer you this License
+giving you legal permission to copy, distribute and/or modify it.
+
+  For the developers' and authors' protection, the GPL clearly explains
+that there is no warranty for this free software.  For both users' and
+authors' sake, the GPL requires that modified versions be marked as
+changed, so that their problems will not be attributed erroneously to
+authors of previous versions.
+
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+                     END OF TERMS AND CONDITIONS
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+Also add information on how to contact you by electronic and paper mail.
+
+  If the program does terminal interaction, make it output a short
+notice like this when it starts in an interactive mode:
+
+    <program>  Copyright (C) <year>  <name of author>
+    This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+    This is free software, and you are welcome to redistribute it
+    under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License.  Of course, your program's commands
+might be different; for a GUI interface, you would use an "about box".
+
+  You should also get your employer (if you work as a programmer) or school,
+if any, to sign a "copyright disclaimer" for the program, if necessary.
+For more information on this, and how to apply and follow the GNU GPL, see
+<https://www.gnu.org/licenses/>.
+
+  The GNU General Public License does not permit incorporating your program
+into proprietary programs.  If your program is a subroutine library, you
+may consider it more useful to permit linking proprietary applications with
+the library.  If this is what you want to do, use the GNU Lesser General
+Public License instead of this License.  But first, please read
+<https://www.gnu.org/licenses/why-not-lgpl.html>.
+=#
 module GTPSA
 
 
@@ -179,17 +855,17 @@ Function to set global variables in GTPSA. Options for `a` are:
 - `show_header::Bool`        -- specifies whether or not to print the GTPSA `Descriptor` information above each TPS output
 """
 function setGTPSA!(a::AbstractString, val)
-  a == "desc_current" && (GTPSA.desc_current = val; return)
-  a == "show_eps"     && (GTPSA.show_eps = val; return)
-  a == "show_sparse"  && (GTPSA.show_sparse = val; return)
-  a == "show_header"  && (GTPSA.show_header = val; return)
+  a == "desc_current" && (return (GTPSA.desc_current = val))
+  a == "show_eps"     && (return (GTPSA.show_eps = val))
+  a == "show_sparse"  && (return (GTPSA.show_sparse = val))
+  a == "show_header"  && (return (GTPSA.show_header = val))
   error("Global variable \"$(a)\" does not exist!")
 end
 
 """
-    setGTPSA!(a::AbstractString, val)
+    getGTPSA(a::AbstractString)
 
-Function to set global variables in GTPSA. Options for `a` are:
+Function to get global variables in GTPSA. Options for `a` are:
 
 - `desc_current::Descriptor` -- defines the `Descriptor` to use when that information is not explicitly (or implicitly in a TPS copy constructor) available, e.g. when calling `TPS(a)` where `a` is not a TPS. This is set each time a new `Descriptor` is defined
 - `show_eps::Float64`        -- defines the value below which the absolute value of a monomial coefficient is NOT printed
@@ -206,33 +882,35 @@ end
 
 # Descriptor outer constructors
 """
-    Descriptor(nv::Integer, vo::Integer)::Descriptor
+    Descriptor(nv::Integer, mo::Integer)::Descriptor
 
-Creates a TPSA `Descriptor` with `nv` variables of maximum order `vo` for each.
+Creates a TPSA `Descriptor` with `nv` variables, and a maximum truncation order `mo`.
 
 ### Input
 - `nv` -- Number of variables in the TPSA
-- `vo` -- Maximum order of the variables in the TPSA
+- `mo` -- Maximum truncation order of the TPSA
 """
-function Descriptor(nv::Integer, vo::Integer)::Descriptor
-  d = Descriptor(mad_desc_newv(convert(Cint, nv), convert(Cuchar, vo)))
+function Descriptor(nv::Integer, mo::Integer)::Descriptor
+  d = Descriptor(mad_desc_newv(convert(Cint, nv), convert(Cuchar, mo)))
   GTPSA.desc_current = d
   return d
 end
 
 """
-    Descriptor(vos::Vector{<:Integer})::Descriptor
+    Descriptor(vos::Vector{<:Integer}, mo::Integer)::Descriptor
 
-Creates a TPSA `Descriptor` with `length(mos)` variables with individual truncation 
-orders specified in the Vector `vos`. 
+Creates a TPSA `Descriptor` with `length(vos)` variables with individual truncation 
+orders specified in the Vector `vos`, and a maximum truncation order `mo` for the TPSA.
 
 ### Input
 - `vos` -- `Vector` of the individual truncation orders of each variable
+- `mo`  -- Maximum truncation order of the TPSA, <= sum(vos)
 """
-function Descriptor(vos::Vector{<:Integer})::Descriptor
+function Descriptor(vos::Vector{<:Integer}, mo::Integer)::Descriptor
+  all(vos .<= mo) == true || error("Atleast one variable truncation order is > the maximum truncation order!")
+  mo <= sum(vos) || (@info "Maximum order too high: setting maximum order = sum($vos) = $(sum(vos))"; mo = sum(vos))
   nv = length(vos)
   np = 0
-  mo = maximum(vos)
   po = 0
   no = vos
   d = Descriptor(mad_desc_newvpo(convert(Cint, nv), convert(Cuchar, mo), convert(Cint, np), convert(Cuchar, po), convert(Vector{Cuchar}, no)))
@@ -241,42 +919,42 @@ function Descriptor(vos::Vector{<:Integer})::Descriptor
 end
 
 """
-    Descriptor(nv::Integer, vo::Integer, np::Integer, po::Integer)::Descriptor
+    Descriptor(nv::Integer, mo::Integer, np::Integer, po::Integer)::Descriptor
 
-Creates a TPSA `Descriptor` with `nv` variables each with truncation order `vo`, and `np` 
-parameters each with truncation order `po`
+Creates a TPSA `Descriptor` with `nv` variables and `np` parameters. The maximum 
+truncation order is `mo` (including the parameters), and the truncation order for 
+the parameters part of a monomial is `po`.
 
 ### Input
 - `nv` -- Number of variables in the TPSA
-- `vo` -- Truncation order of the variables in the TPSA
+- `mo` -- Maximum truncation order of the TPSA including variables and parameters
 - `np` -- Number of parameters in the TPSA
-- `po` -- Truncation order of the parameters
+- `po` -- Truncation order of the parameters part of a monomial
 """
-function Descriptor(nv::Integer, vo::Integer, np::Integer, po::Integer)::Descriptor
-  mo = max(vo,po)
-  no = vcat(Cuchar(vo)*ones(Cuchar,nv), Cuchar(po)*ones(Cuchar,np))
-  d = Descriptor(mad_desc_newvpo(convert(Cint, nv), convert(Cuchar, mo), convert(Cint, np), convert(Cuchar, po), no))
+function Descriptor(nv::Integer, mo::Integer, np::Integer, po::Integer)::Descriptor
+  d = Descriptor(mad_desc_newvp(convert(Cint, nv), convert(Cuchar, mo), convert(Cint, np), convert(Cuchar, po)))
   GTPSA.desc_current = d
   return d
 end
 
 
 """
-    Descriptor(vos::Vector{<:Integer}, pos::Vector{<:Integer})::Descriptor
+    Descriptor(vos::Vector{<:Integer}, mo::Integer, pos::Vector{<:Integer}, po::Integer)::Descriptor
 
 Creates a TPSA `Descriptor` with `length(vos)` variables with individual truncation 
 orders specified in `vos`, and `length(pos)` parameters with individual truncation 
-orders specified in `pos`.
+orders specified in `pos`. The maximum truncation order including both variables and 
+parameters is `mo`, and the truncation order for just the parameters part of the is `po`.
 
 ### Input
 - `vos` -- `Vector` of the individual truncation orders of each variable
+- `mo`  -- Maximum truncation order of the TPSA including variables and parameters
 - `pos` -- `Vector` of the individual truncation orders of each parameter
+- `po` -- Truncation order of the parameters part of a monomial
 """
-function Descriptor(vos::Vector{<:Integer}, pos::Vector{<:Integer})::Descriptor
+function Descriptor(vos::Vector{<:Integer}, mo::Integer, pos::Vector{<:Integer}, po::Integer)::Descriptor
   nv = length(vos)
   np = length(pos)
-  po = maximum(pos)
-  mo = max(maximum(vos),po)
   no = vcat(vos,pos)
   d = Descriptor(mad_desc_newvpo(convert(Cint, nv), convert(Cuchar, mo), convert(Cint, np), convert(Cuchar, po), convert(Vector{Cuchar}, no)))
   GTPSA.desc_current = d
diff --git a/src/show.jl b/src/show.jl
index e69d1736..98224b40 100644
--- a/src/show.jl
+++ b/src/show.jl
@@ -1,31 +1,37 @@
 
 # --- print ---
 function show_GTPSA_info(io::IO, desc::Desc)
+  mo = desc.mo
   nv = desc.nv
   np = desc.np
   nn = desc.nn
+  po = desc.po
   no_ = unsafe_wrap(Vector{Cuchar}, desc.no, nn)
   no = convert(Vector{Int}, no_)
+  @printf(io, "%-18s %i\n", "Maximum order: ", mo)
+  lines_used = 1
   if nv > 0
     @printf(io, "%-18s %i\n", "# Variables: ", nv)
-    if all(no[1] .== no[1:nv])
-      @printf(io, "%-18s %i\n", "Variable order: ", no[1])
-    else
+    lines_used += 1
+    if !(all(no[1] .== no[1:nv]))
       @printf(io, "%-18s", "Variable orders: ")
       print(io, no[1:nv])
       print(io, "\n")
+      lines_used += 1
     end
   end
   if np > 0
+    @printf(io, "%-18s %i\n", "Parameter order: ", po)
     @printf(io, "%-18s %i\n", "# Parameters: ", np)
-    if all(no[nv+1] .== no[nv+1:end])
-      @printf(io, "%-18s %i\n", "Parameter order: ", no[nv+1])
-    else
+    lines_used += 2
+    if !(all(no[nv+1] .== no[nv+1:end]))
       @printf(io, "%-18s", "Parameter orders: ")
       print(io, no[nv+1:end])
       print(io, "\n")
+      lines_used += 1
     end
   end
+  return lines_used
 end
 
 function show(io::IO, d::Descriptor)
@@ -153,9 +159,8 @@ function show(io::IO, t::TPS)
   extralines = 0
   if GTPSA.show_header
     println(io, "-----------------------")
-    show_GTPSA_info(io, desc)
+    extralines += 2 + show_GTPSA_info(io, desc)
     println(io, "-----------------------")
-    extralines = 2 + (desc.nv > 0 ? 2 : 0) + (desc.np > 0 ? 2 : 0)
   end
   # Check if sparse monomial or exponent:
   if GTPSA.show_sparse
@@ -249,9 +254,8 @@ function show(io::IO, t::ComplexTPS)
   extralines = 0
   if GTPSA.show_header
     println(io, "-----------------------")
-    show_GTPSA_info(io, desc)
+    extralines += 2 + show_GTPSA_info(io, desc)
     println(io, "-----------------------")
-    extralines = 2 + (desc.nv > 0 ? 2 : 0) + (desc.np > 0 ? 2 : 0)
   end
   if GTPSA.show_sparse
     println(io, " Real                     Imag                       Order   Monomial")
@@ -294,9 +298,8 @@ function show_vec(io::IO, m::Vector{<:Union{TPS,ComplexTPS}})
       lines_used[] += 1
     else
       println(io, "-----------------------")
-      show_GTPSA_info(io, desc)
+      lines_used[] += 2 + show_GTPSA_info(io, desc)
       println(io, "-----------------------")
-      lines_used[] += 2 + (desc.nv > 0 ? 2 : 0) + (desc.np > 0 ? 2 : 0)
     end
   end
   show_map!(io, m, lines_used)