diff --git a/core/src/toga/app.py b/core/src/toga/app.py
index 6980ac577b..79e972ca44 100644
--- a/core/src/toga/app.py
+++ b/core/src/toga/app.py
@@ -27,7 +27,7 @@
 from toga.window import OnCloseHandler, Window
 
 if TYPE_CHECKING:
-    from toga.icons import IconContent
+    from toga.icons import IconContentT
     from toga.types import PositionT, SizeT
 
 # Make sure deprecation warnings are shown by default
@@ -314,7 +314,7 @@ def __init__(
         app_id: str | None = None,
         app_name: str | None = None,
         *,
-        icon: IconContent | None = None,
+        icon: IconContentT | None = None,
         author: str | None = None,
         version: str | None = None,
         home_page: str | None = None,
@@ -345,7 +345,7 @@ def __init__(
                For example, an ``app_id`` of ``com.example.my-app`` would yield a
                distribution name of ``my-app``.
             #. As a last resort, the name ``toga``.
-        :param icon: The :any:`icon <IconContent>` for the app. Defaults to
+        :param icon: The :any:`icon <IconContentT>` for the app. Defaults to
             :attr:`toga.Icon.APP_ICON`.
         :param author: The person or organization to be credited as the author of the
             app. If not provided, the metadata key ``Author`` will be used.
@@ -535,12 +535,12 @@ def home_page(self) -> str | None:
     def icon(self) -> Icon:
         """The Icon for the app.
 
-        Can be specified as any valid :any:`icon content <IconContent>`.
+        Can be specified as any valid :any:`icon content <IconContentT>`.
         """
         return self._icon
 
     @icon.setter
-    def icon(self, icon_or_name: IconContent) -> None:
+    def icon(self, icon_or_name: IconContentT) -> None:
         if isinstance(icon_or_name, Icon):
             self._icon = icon_or_name
         else:
@@ -855,7 +855,7 @@ def __init__(
         app_id: str | None = None,
         app_name: str | None = None,
         *,
-        icon: IconContent | None = None,
+        icon: IconContentT | None = None,
         author: str | None = None,
         version: str | None = None,
         home_page: str | None = None,
diff --git a/core/src/toga/command.py b/core/src/toga/command.py
index 167bde400d..ba6bb5f956 100644
--- a/core/src/toga/command.py
+++ b/core/src/toga/command.py
@@ -10,7 +10,7 @@
 
 if TYPE_CHECKING:
     from toga.app import App
-    from toga.icons import IconContent
+    from toga.icons import IconContentT
 
 
 class Group:
@@ -167,7 +167,7 @@ def __init__(
         *,
         shortcut: str | Key | None = None,
         tooltip: str | None = None,
-        icon: IconContent | None = None,
+        icon: IconContentT | None = None,
         group: Group = Group.COMMANDS,
         section: int = 0,
         order: int = 0,
@@ -184,7 +184,7 @@ def __init__(
         :param text: A label for the command.
         :param shortcut: A key combination that can be used to invoke the command.
         :param tooltip: A short description of what the command will do.
-        :param icon: The :any:`icon content <IconContent>` that can be used to decorate
+        :param icon: The :any:`icon content <IconContentT>` that can be used to decorate
             the command if the platform requires.
         :param group: The group to which this command belongs.
         :param section: The section where the command should appear within its group.
@@ -234,12 +234,12 @@ def enabled(self, value: bool) -> None:
     def icon(self) -> Icon | None:
         """The Icon for the command.
 
-        Can be specified as any valid :any:`icon content <IconContent>`.
+        Can be specified as any valid :any:`icon content <IconContentT>`.
         """
         return self._icon
 
     @icon.setter
-    def icon(self, icon_or_name: IconContent | None) -> None:
+    def icon(self, icon_or_name: IconContentT | None) -> None:
         if isinstance(icon_or_name, Icon) or icon_or_name is None:
             self._icon = icon_or_name
         else:
diff --git a/core/src/toga/icons.py b/core/src/toga/icons.py
index 810322bc54..8d45474eb7 100644
--- a/core/src/toga/icons.py
+++ b/core/src/toga/icons.py
@@ -15,7 +15,7 @@
     else:
         from typing import TypeAlias
 
-    IconContent: TypeAlias = str | Path | toga.Icon
+    IconContentT: TypeAlias = str | Path | toga.Icon
 
 
 class cachedicon:
diff --git a/core/src/toga/images.py b/core/src/toga/images.py
index c2c3fb4f97..eb4d9fc668 100644
--- a/core/src/toga/images.py
+++ b/core/src/toga/images.py
@@ -1,6 +1,7 @@
 from __future__ import annotations
 
 import importlib
+import os
 import sys
 import warnings
 from functools import lru_cache
@@ -31,10 +32,10 @@
     ImageT = TypeVar("ImageT")
 
     # Define the types that can be used as Image content
-    PathLike: TypeAlias = str | Path
-    BytesLike: TypeAlias = bytes | bytearray | memoryview
-    ImageLike: TypeAlias = Any
-    ImageContent: TypeAlias = PathLike | BytesLike | ImageLike
+    PathLikeT: TypeAlias = str | os.PathLike
+    BytesLikeT: TypeAlias = bytes | bytearray | memoryview
+    ImageLikeT: TypeAlias = Any
+    ImageContentT: TypeAlias = PathLikeT | BytesLikeT | ImageLikeT
 
     # Define a type variable representing an image of an externally defined type.
     ExternalImageT = TypeVar("ExternalImageT")
@@ -49,7 +50,7 @@ class ImageConverter(Protocol):
     image_class: type[ExternalImageT]
 
     @staticmethod
-    def convert_from_format(image_in_format: ExternalImageT) -> BytesLike:
+    def convert_from_format(image_in_format: ExternalImageT) -> BytesLikeT:
         """Convert from :any:`image_class` to data in a :ref:`known image format
         <known-image-formats>`.
 
@@ -61,7 +62,7 @@ def convert_from_format(image_in_format: ExternalImageT) -> BytesLike:
 
     @staticmethod
     def convert_to_format(
-        data: BytesLike,
+        data: BytesLikeT,
         image_class: type[ExternalImageT],
     ) -> ExternalImageT:
         """Convert from data to :any:`image_class` or specified subclass.
@@ -83,7 +84,7 @@ def convert_to_format(
 class Image:
     def __init__(
         self,
-        src: ImageContent = NOT_PROVIDED,
+        src: ImageContentT = NOT_PROVIDED,
         *,
         path: object = NOT_PROVIDED,  # DEPRECATED
         data: object = NOT_PROVIDED,  # DEPRECATED
@@ -91,7 +92,7 @@ def __init__(
         """Create a new image.
 
         :param src: The source from which to load the image. Can be any valid
-            :any:`image content <ImageContent>` type.
+            :any:`image content <ImageContentT>` type.
         :param path: **DEPRECATED** - Use ``src``.
         :param data: **DEPRECATED** - Use ``src``.
         :raises FileNotFoundError: If a path is provided, but that path does not exist.
diff --git a/core/src/toga/plugins/image_formats.py b/core/src/toga/plugins/image_formats.py
index 4bd5778397..4787a3267b 100644
--- a/core/src/toga/plugins/image_formats.py
+++ b/core/src/toga/plugins/image_formats.py
@@ -4,7 +4,7 @@
 from typing import TYPE_CHECKING
 
 if TYPE_CHECKING:
-    from toga.images import BytesLike
+    from toga.images import BytesLikeT
 
 # Presumably, other converter plugins will be included with, or only installed
 # alongside, the packages they're for. But since this is provided in Toga, we need to
@@ -29,7 +29,7 @@ def convert_from_format(image_in_format: PIL.Image.Image) -> bytes:
 
     @staticmethod
     def convert_to_format(
-        data: BytesLike,
+        data: BytesLikeT,
         image_class: type[PIL.Image.Image],
     ) -> PIL.Image.Image:
         # PIL Images aren't designed to be subclassed, so no implementation is necessary
diff --git a/core/src/toga/widgets/button.py b/core/src/toga/widgets/button.py
index 6f34389d8a..c6ab49b7b1 100644
--- a/core/src/toga/widgets/button.py
+++ b/core/src/toga/widgets/button.py
@@ -8,7 +8,7 @@
 from .base import StyleT, Widget
 
 if TYPE_CHECKING:
-    from toga.icons import IconContent
+    from toga.icons import IconContentT
 
 
 class OnPressHandler(Protocol):
@@ -24,7 +24,7 @@ class Button(Widget):
     def __init__(
         self,
         text: str | None = None,
-        icon: IconContent | None = None,
+        icon: IconContentT | None = None,
         id: str | None = None,
         style: StyleT | None = None,
         on_press: toga.widgets.button.OnPressHandler | None = None,
@@ -34,7 +34,7 @@ def __init__(
 
         :param text: The text to display on the button.
         :param icon: The icon to display on the button. Can be specified as any valid
-            :any:`icon content <IconContent>`.
+            :any:`icon content <IconContentT>`.
         :param id: The ID for the widget.
         :param style: A style object. If no style is provided, a default style will be
             applied to the widget.
@@ -100,7 +100,7 @@ def text(self, value: str | None) -> None:
     def icon(self) -> toga.Icon | None:
         """The icon displayed on the button.
 
-        Can be specified as any valid :any:`icon content <IconContent>`.
+        Can be specified as any valid :any:`icon content <IconContentT>`.
 
         If the button is currently displaying text, and an icon is assigned, the text
         will be replaced by the new icon.
@@ -113,7 +113,7 @@ def icon(self) -> toga.Icon | None:
         return self._impl.get_icon()
 
     @icon.setter
-    def icon(self, value: IconContent | None) -> None:
+    def icon(self, value: IconContentT | None) -> None:
         if isinstance(value, toga.Icon):
             icon = value
             text = ""
diff --git a/core/src/toga/widgets/imageview.py b/core/src/toga/widgets/imageview.py
index 6826a3c32d..663b3d1071 100644
--- a/core/src/toga/widgets/imageview.py
+++ b/core/src/toga/widgets/imageview.py
@@ -9,7 +9,7 @@
 from toga.widgets.base import StyleT, Widget
 
 if TYPE_CHECKING:
-    from toga.images import ImageContent, ImageT
+    from toga.images import ImageContentT, ImageT
 
 
 def rehint_imageview(
@@ -70,7 +70,7 @@ def rehint_imageview(
 class ImageView(Widget):
     def __init__(
         self,
-        image: ImageContent | None = None,
+        image: ImageContentT | None = None,
         id: str | None = None,
         style: StyleT | None = None,
     ):
@@ -78,7 +78,7 @@ def __init__(
         Create a new image view.
 
         :param image: The image to display. Can be any valid :any:`image content
-            <ImageContent>` type; or :any:`None` to display no image.
+            <ImageContentT>` type; or :any:`None` to display no image.
         :param id: The ID for the widget.
         :param style: A style object. If no style is provided, a default style will be
             applied to the widget.
@@ -111,12 +111,12 @@ def image(self) -> toga.Image | None:
         """The image to display.
 
         When setting an image, you can provide any valid :any:`image content
-        <ImageContent>` type; or :any:`None` to clear the image view.
+        <ImageContentT>` type; or :any:`None` to clear the image view.
         """
         return self._image
 
     @image.setter
-    def image(self, image: ImageContent) -> None:
+    def image(self, image: ImageContentT) -> None:
         if isinstance(image, toga.Image):
             self._image = image
         elif image is None:
diff --git a/core/src/toga/widgets/numberinput.py b/core/src/toga/widgets/numberinput.py
index b50f556219..8a9907fe67 100644
--- a/core/src/toga/widgets/numberinput.py
+++ b/core/src/toga/widgets/numberinput.py
@@ -17,8 +17,7 @@
     else:
         from typing import TypeAlias
 
-    NumberInputT: TypeAlias = Union[Decimal, float, str]
-    StepInputT: TypeAlias = Union[Decimal, int]
+    NumberInputT: TypeAlias = Union[Decimal, int, float, str]
 
 # Implementation notes
 # ====================
@@ -35,7 +34,7 @@
 NUMERIC_RE = re.compile(r"[^0-9\.-]")
 
 
-def _clean_decimal(value: NumberInputT, step: StepInputT | None = None) -> Decimal:
+def _clean_decimal(value: NumberInputT, step: NumberInputT | None = None) -> Decimal:
     # Decimal(3.7) yields "3.700000000...177".
     # However, Decimal(str(3.7)) yields "3.7". If the user provides a float,
     # convert to a string first.
@@ -87,7 +86,7 @@ def __init__(
         self,
         id: str | None = None,
         style: StyleT | None = None,
-        step: StepInputT = 1,
+        step: NumberInputT = 1,
         min: NumberInputT | None = None,
         max: NumberInputT | None = None,
         value: NumberInputT | None = None,
@@ -181,7 +180,7 @@ def step(self) -> Decimal:
         return self._step
 
     @step.setter
-    def step(self, step: StepInputT) -> None:
+    def step(self, step: NumberInputT) -> None:
         try:
             self._step = _clean_decimal(step)
         except (ValueError, TypeError, InvalidOperation):
diff --git a/core/src/toga/widgets/optioncontainer.py b/core/src/toga/widgets/optioncontainer.py
index 5de0337fd1..8716ebb7c6 100644
--- a/core/src/toga/widgets/optioncontainer.py
+++ b/core/src/toga/widgets/optioncontainer.py
@@ -15,12 +15,12 @@
         from typing_extensions import TypeAlias
     else:
         from typing import TypeAlias
-    from toga.icons import IconContent
+    from toga.icons import IconContentT
 
-    OptionContainerContent: TypeAlias = (
+    OptionContainerContentT: TypeAlias = (
         tuple[str, Widget]
-        | tuple[str, Widget, IconContent | None]
-        | tuple[str, Widget, IconContent | None, bool]
+        | tuple[str, Widget, IconContentT | None]
+        | tuple[str, Widget, IconContentT | None, bool]
         | toga.OptionItem
     )
 
@@ -40,14 +40,14 @@ def __init__(
         text: str,
         content: Widget,
         *,
-        icon: IconContent | None = None,
+        icon: IconContentT | None = None,
         enabled: bool = True,
     ):
         """A tab of content in an OptionContainer.
 
         :param text: The text label for the new tab.
         :param content: The content widget to use for the new tab.
-        :param icon: The :any:`icon content <IconContent>` to use to represent the tab.
+        :param icon: The :any:`icon content <IconContentT>` to use to represent the tab.
         :param enabled: Should the new tab be enabled?
         """
         if content is None:
@@ -128,7 +128,7 @@ def text(self, value: object) -> None:
     def icon(self) -> toga.Icon:
         """The Icon for the tab of content.
 
-        Can be specified as any valid :any:`icon content <IconContent>`.
+        Can be specified as any valid :any:`icon content <IconContentT>`.
 
         If the platform does not support the display of icons, this property
         will return ``None`` regardless of any value provided.
@@ -139,7 +139,7 @@ def icon(self) -> toga.Icon:
             return self._interface._impl.get_option_icon(self.index)
 
     @icon.setter
-    def icon(self, icon_or_name: IconContent | None) -> None:
+    def icon(self, icon_or_name: IconContentT | None) -> None:
         if get_platform_factory().OptionContainer.uses_icons:
             if icon_or_name is None:
                 icon = None
@@ -274,7 +274,7 @@ def append(
         text_or_item: str,
         content: Widget,
         *,
-        icon: IconContent | None = None,
+        icon: IconContentT | None = None,
         enabled: bool | None = True,
     ) -> None: ...
 
@@ -283,7 +283,7 @@ def append(
         text_or_item: str | OptionItem,
         content: Widget | None = None,
         *,
-        icon: IconContent | None = None,
+        icon: IconContentT | None = None,
         enabled: bool | None = None,
     ) -> None:
         """Add a new tab of content to the OptionContainer.
@@ -295,7 +295,7 @@ def append(
 
         :param text_or_item: An :any:`OptionItem`; or, the text label for the new tab.
         :param content: The content widget to use for the new tab.
-        :param icon: The :any:`icon content <IconContent>` to use to represent the tab.
+        :param icon: The :any:`icon content <IconContentT>` to use to represent the tab.
         :param enabled: Should the new tab be enabled? (Default: ``True``)
         """
         self.insert(len(self), text_or_item, content, icon=icon, enabled=enabled)
@@ -314,7 +314,7 @@ def insert(
         text_or_item: str,
         content: Widget,
         *,
-        icon: IconContent | None = None,
+        icon: IconContentT | None = None,
         enabled: bool | None = True,
     ) -> None: ...
 
@@ -324,7 +324,7 @@ def insert(
         text_or_item: str | OptionItem,
         content: Widget | None = None,
         *,
-        icon: IconContent | None = None,
+        icon: IconContentT | None = None,
         enabled: bool | None = None,
     ) -> None:
         """Insert a new tab of content to the OptionContainer at the specified index.
@@ -337,7 +337,7 @@ def insert(
         :param index: The index where the new tab should be inserted.
         :param text_or_item: An :any:`OptionItem`; or, the text label for the new tab.
         :param content: The content widget to use for the new tab.
-        :param icon: The :any:`icon content <IconContent>` to use to represent the tab.
+        :param icon: The :any:`icon content <IconContentT>` to use to represent the tab.
         :param enabled: Should the new tab be enabled? (Default: ``True``)
         """
         if isinstance(text_or_item, OptionItem):
@@ -380,7 +380,7 @@ def __init__(
         self,
         id: str | None = None,
         style: StyleT | None = None,
-        content: Iterable[OptionContainerContent] | None = None,
+        content: Iterable[OptionContainerContentT] | None = None,
         on_select: toga.widgets.optioncontainer.OnSelectHandler | None = None,
     ):
         """Create a new OptionContainer.
@@ -389,7 +389,7 @@ def __init__(
         :param style: A style object. If no style is provided, a default style will be
             applied to the widget.
         :param content: The initial :any:`OptionContainer content
-            <OptionContainerContent>` to display in the OptionContainer.
+            <OptionContainerContentT>` to display in the OptionContainer.
         :param on_select: Initial :any:`on_select` handler.
         """
         super().__init__(id=id, style=style)
diff --git a/core/src/toga/widgets/splitcontainer.py b/core/src/toga/widgets/splitcontainer.py
index 7dc120d667..04589bc737 100644
--- a/core/src/toga/widgets/splitcontainer.py
+++ b/core/src/toga/widgets/splitcontainer.py
@@ -1,7 +1,7 @@
 from __future__ import annotations
 
 import sys
-from typing import TYPE_CHECKING, Tuple, Union
+from typing import TYPE_CHECKING
 
 from toga.app import App
 from toga.constants import Direction
@@ -15,7 +15,7 @@
     else:
         from typing import TypeAlias
 
-    ContentT: TypeAlias = Union[Widget, Tuple[Widget, float], None]
+    SplitContainerContentT: TypeAlias = Widget | tuple[Widget, float] | None
 
 
 class SplitContainer(Widget):
@@ -27,7 +27,7 @@ def __init__(
         id: str | None = None,
         style: StyleT | None = None,
         direction: Direction = Direction.VERTICAL,
-        content: tuple[ContentT, ContentT] = (None, None),
+        content: tuple[SplitContainerContentT, SplitContainerContentT] = (None, None),
     ):
         """Create a new SplitContainer.
 
@@ -38,11 +38,14 @@ def __init__(
             :attr:`~toga.constants.Direction.HORIZONTAL` or
             :attr:`~toga.constants.Direction.VERTICAL`; defaults to
             :attr:`~toga.constants.Direction.VERTICAL`
-        :param content: Initial :any:`content` of the container. Defaults to both panels
-            being empty.
+        :param content: Initial :any:`SplitContainer content <SplitContainerContentT>`
+            of the container. Defaults to both panels being empty.
         """
         super().__init__(id=id, style=style)
-        self._content: tuple[ContentT, ContentT] = (None, None)
+        self._content: tuple[SplitContainerContentT, SplitContainerContentT] = (
+            None,
+            None,
+        )
 
         # Create a platform specific implementation of a SplitContainer
         self._impl = self.factory.SplitContainer(interface=self)
@@ -68,7 +71,7 @@ def focus(self) -> None:
         pass
 
     @property
-    def content(self) -> tuple[ContentT, ContentT]:
+    def content(self) -> tuple[SplitContainerContentT, SplitContainerContentT]:
         """The widgets displayed in the SplitContainer.
 
         This property accepts a sequence of exactly 2 elements, each of which can be
@@ -86,7 +89,9 @@ def content(self) -> tuple[ContentT, ContentT]:
         return self._content
 
     @content.setter
-    def content(self, content: tuple[ContentT, ContentT]) -> None:
+    def content(
+        self, content: tuple[SplitContainerContentT, SplitContainerContentT]
+    ) -> None:
         try:
             if len(content) != 2:
                 raise TypeError()
diff --git a/docs/reference/api/containers/optioncontainer.rst b/docs/reference/api/containers/optioncontainer.rst
index 728a53d51e..b6e3d79a0e 100644
--- a/docs/reference/api/containers/optioncontainer.rst
+++ b/docs/reference/api/containers/optioncontainer.rst
@@ -174,14 +174,14 @@ Notes
 Reference
 ---------
 
-.. c:type:: OptionContainerContent
+.. c:type:: OptionContainerContentT
 
     An item of :any:`OptionContainer` content can be:
 
     * a 2-tuple, containing the title for the tab, and the content widget;
-    * a 3-tuple, containing the title, content widget, and :any:`icon <IconContent>`
+    * a 3-tuple, containing the title, content widget, and :any:`icon <IconContentT>`
       for the tab;
-    * a 4-tuple, containing the title, content widget, :any:`icon <IconContent>` for
+    * a 4-tuple, containing the title, content widget, :any:`icon <IconContentT>` for
       the tab, and enabled status; or
     * an :any:`toga.OptionItem` instance.
 
diff --git a/docs/reference/api/containers/splitcontainer.rst b/docs/reference/api/containers/splitcontainer.rst
index 48c0ea8e13..6d04683daf 100644
--- a/docs/reference/api/containers/splitcontainer.rst
+++ b/docs/reference/api/containers/splitcontainer.rst
@@ -49,7 +49,7 @@ Usage
     left_container = toga.Box()
     right_container = toga.ScrollContainer()
 
-    split = toga.SplitContainer(content=[left_container, right_container])
+    split = toga.SplitContainer(content=(left_container, right_container))
 
 Content can be specified when creating the widget, or after creation by assigning
 the ``content`` attribute. The direction of the split can also be configured, either
@@ -65,7 +65,7 @@ at time of creation, or by setting the ``direction`` attribute:
     left_container = toga.Box()
     right_container = toga.ScrollContainer()
 
-    split.content = [left_container, right_container]
+    split.content = (left_container, right_container)
 
 By default, the space of the SplitContainer will be evenly divided between the
 two panels. To specify an uneven split, you can provide a flex value when specifying
@@ -80,7 +80,7 @@ and right panels.
     left_container = toga.Box()
     right_container = toga.ScrollContainer()
 
-    split.content = [(left_container, 3), (right_container, 2)]
+    split.content = ((left_container, 3), (right_container, 2))
 
 This only specifies the initial split; the split can be modified by the user
 once it is displayed.
@@ -88,5 +88,12 @@ once it is displayed.
 Reference
 ---------
 
+.. c:type:: SplitContainerContentT
+
+    An item of :any:`SplitContainer` content can be:
+
+    * a :class:`~toga.Widget`; or
+    * a 2-tuple, containing a :class:`~toga.Widget`, and an :any:`int` flex value
+
 .. autoclass:: toga.SplitContainer
    :exclude-members: HORIZONTAL, VERTICAL, window, app
diff --git a/docs/reference/api/resources/icons.rst b/docs/reference/api/resources/icons.rst
index 90cdfad228..3f517d4ef7 100644
--- a/docs/reference/api/resources/icons.rst
+++ b/docs/reference/api/resources/icons.rst
@@ -80,7 +80,7 @@ permission error). In this case, an error will be raised.
 Reference
 ---------
 
-.. c:type:: IconContent
+.. c:type:: IconContentT
 
     When specifying an :any:`Icon`, you can provide:
 
diff --git a/docs/reference/api/resources/images.rst b/docs/reference/api/resources/images.rst
index 59aa204451..498d2ccee8 100644
--- a/docs/reference/api/resources/images.rst
+++ b/docs/reference/api/resources/images.rst
@@ -30,7 +30,7 @@ Usage
     widget configured to use an Icon (probably :class:`~toga.Button`), *not* an
     ``on_press`` handler on an :class:`~toga.Image` or :class:`~toga.ImageView`.
 
-An image can be constructed from a :any:`wide range of sources <ImageContent>`:
+An image can be constructed from a :any:`wide range of sources <ImageContentT>`:
 
 .. code-block:: python
 
@@ -86,13 +86,13 @@ Notes
 Reference
 ---------
 
-.. c:type:: ImageContent
+.. c:type:: ImageContentT
 
     When specifying content for an :any:`Image`, you can provide:
 
     * a string specifying an absolute or relative path to a file in a :ref:`known image
       format <known-image-formats>`;
-    * an absolute or relative :any:`pathlib.Path` object describing a file in a
+    * an absolute or relative :class:`~pathlib.Path` object describing a file in a
       :ref:`known image format <known-image-formats>`;
     * a "blob of bytes" data type (:any:`bytes`, :any:`bytearray`, or :any:`memoryview`)
       containing raw image data in a :ref:`known image format <known-image-formats>`;
diff --git a/docs/reference/api/widgets/numberinput.rst b/docs/reference/api/widgets/numberinput.rst
index 950aad45b0..77b532a693 100644
--- a/docs/reference/api/widgets/numberinput.rst
+++ b/docs/reference/api/widgets/numberinput.rst
@@ -53,9 +53,9 @@ Usage
     widget = toga.NumberInput(min_value=1, max_value=10, step=0.001)
     widget.value = 2.718
 
-NumberInput's properties can accept integers, floats, and strings containing
-numbers, but they always return :any:`decimal.Decimal` objects to ensure
-precision is retained.
+NumberInput's properties can accept :class:`~decimal.Decimal`, :any:`int`, :any:`float`,
+or :any:`str` containing numbers, but they always return :class:`~decimal.Decimal`
+objects to ensure precision is retained.
 
 Reference
 ---------
diff --git a/dummy/src/toga_dummy/plugins/image_formats.py b/dummy/src/toga_dummy/plugins/image_formats.py
index d58686b739..923ceb418c 100644
--- a/dummy/src/toga_dummy/plugins/image_formats.py
+++ b/dummy/src/toga_dummy/plugins/image_formats.py
@@ -6,7 +6,7 @@
 import toga
 
 if TYPE_CHECKING:
-    from toga.images import BytesLike
+    from toga.images import BytesLikeT
 
 
 class CustomImage:
@@ -26,7 +26,7 @@ def convert_from_format(image_in_format: CustomImage):
 
     @staticmethod
     def convert_to_format(
-        data: BytesLike,
+        data: BytesLikeT,
         image_class: type[CustomImage],
     ) -> CustomImage:
         image = image_class()
@@ -45,7 +45,7 @@ def convert_from_format(image_in_format: Any):
 
     @staticmethod
     def convert_to_format(
-        data: BytesLike,
+        data: BytesLikeT,
         image_class: type[Any],
     ) -> Any:
         raise Exception("Converter should be disabled")