How to store last subobjectLevel ?

Go to the script thread and

Go to the script thread and read the post #1.
You can uninstall the script because there is built-in max command for that - ctrl+B.

:)

nice work

Thanks for the nice words about me :) You done good job so hardly need to harm my brain on this task :) Yep, am too like working with ini files, but how (and when) to store settings is dependent on the case. Maybe for this task one temp global variable is a quite enough?

Well, am a bit busy right now but see some points for improvement, so end with some quick script (attached):

macroscript UndoSubObjectLevel
	category:"Anubis" internalcategory:"Anubis"
	tooltip:"Undo SubObject Level"
	buttonText:"Undo SOL"
(
	if not isKindOf ::LastSubObjectLevel Number do
		::LastSubObjectLevel = 0
 
	fn filtActive = (
		selection.count == 1 and IsSubSelEnabled() and \
		getCommandPanelTaskMode() == #modify and \
		numSubObjectLevels >= LastSubObjectLevel
	)
 
	on isEnabled return filtActive()
	on isVisible return filtActive()
	on execute do (swap LastSubObjectLevel subObjectLevel)
)

I made some restrictions, only those that necessary, to avoid errors. Also used Swap function, so the final functionality is more like "undo-last" subObject level. Im not sure is that follow strictly David request, but lets hope its useful anyway :)

Cheers!