For example,
0-127 represents the full ASCII range. It can also be written as
0x0000-0x007f (or
U+0000-U+007f). As another example,
' '-'~' is equivalent to
32-127 and represents the range of printable (visible) ASCII characters.
For any range, the character advance and offset can be customized by appending three space-separated integer values (additional advance, x offset, y offset) to the end. For example
'a'-'b' 4 5 2 sets the advance to
char_width + 4 and offset to
Vector2(5, 2) for both `a` and `b` characters.
Note: The overall number of characters must not exceed the number of
columns multiplied by
rows. Otherwise, the font will fail to import.