Field formatting

Apart from the first field, each field must have a prefix to indicate to the program which field to add text into. The prefix is just a colon (":") added onto the field name. For example:

START
Basic
Front: This is a test.
Back: Test successful!
END

This produces the following card in Anki:

You can omit the prefix for the first field for convenience:

START
Basic
This is a test.
Back: Test successful!
END

And you can continue on a new line for the same field:

START
Basic
This is a test.
And the test is continuing.
Back: Test successful!
END

You must start each new field on a new line. But otherwise you are free to omit as many or as few fields as you wish, or change up the order of fields!