The advanced sort options allow you to configure sort options and sort the file (or selection, if it exists). If in column mode, all of the selected lines are sorted, not just the selected columns.
Ascending
This sets the sort for ascending order ('a' to 'z', 0-9) and is the default.
Descending
This sets the sort for descending order ('z' to 'a', 9-0).
If this checked, then the associated radio button options Where all selected keys match and Where any selected keys match become active and may be selected.
Where all selected keys match
If selected, duplicate strings/characters must exist in ALL active sort keys for a line to be considered a duplicate and be removed.
Where any selected keys match
If selected, a line is considered a duplicate if duplicate strings/characters exist in ANY of the active sort keys.
You can designate active keys using the checkboxes under the RD heading in the "Sort columns" group. This allows you greater flexibility in determining which keys are used for the Remove duplicates sort operation.
See also:
UltraEdit Wiki