Maybe this makes it into EmEditor v14? :D
Hi Yutaka,
what do you think about this feature request?
New option like “[X] Remember Last Selection”
New menu entry “Restore last Selection”
New Macro option document.selection.SelectLast();
If a selection is made, store the coordinates to RAM.
With “Restore last Selection” we would be able to recreate that selection again.
That is often nifty because the selection is always destroyed after we do an action.

Maybe you can even store the last coordinates to file settings?
Thank you for making EmEditor