Sort by

Alphanumeric - numbers are treated as values.
Example: A3, A10, A200.

Alphabetic only - topics are sorted in alphabetic order (0-9, A-Z) and any numbers are treated as individual characters without respect to their numeric value
Example: A10, A200, A3.

Or select one of the Task Info types in the right column.

Sorting depth

Sort just the immediate subtopics, the whole tree (everything under here), or down to a specific depth.

Sorting order

Sort forwards (ascending: A..Z, 1..9, etc.), or backwards (descending:, Z..A, 9..1, etc.).