When I wish to delete duplicate files and would like to (temporarily) switch on a horizontal line
so I can see which file in which folder I am in, when deleting.
Your best bet (if you want it to only be temporary and controlled via a button/hotkey/etc.) is using the Set FULLROWSELECT command to turn on full-row selection.
e.g. Set FULLROWSELECT=Toggle
Thanks for the quick feedback.
Wonderful!
Many thanks indeed.