When PSPad opens, it usually opens the tabs that were open when it
closed,doesn't it?

Maybe it only opens files that were saved when it closed the last time?

In any event, if you want just to have a scratchpad, why not begin a new txt
file, give it a crazy name of some sort to find it again, and just copy to and
from it as needed?

PSPad freeware editor https://www.pspad.com

Odpovedet emailem