The tabstop header allows to sort the list of compared files by name, extension, size, and date&time on the appropriate header. Clicking on the same headers reverses the order. A small arrow on the left of the header text shows the sort direction.

The tabstop header also allows to move the tabstop position of the list. To return back position of columns you have to click on the button Autosize in the Comparison table toolbar.

To sort the files in the corresponding directory using a selected file property:

Tabstop	Meaning
Name	Sorts the files by name, then by extension.
Ext	Sorts the files by type (extension), then by name.
Size	Sorts the files by their size on disk, then by name, then by extension.
Date	Sorts the files by their creation date and time, then by name, then by extension