Changing the props appearance temporarily sounds pretty cool - I guess just make sure you include a right click to return it to normal (like the color tool that comes standard in gmod). Is it possible to apply it to all props that are constrained together? (like the adv duplicator does)
Ah, so you want a stool that you can click on a group of constrained entities, and all the unfrozen props will go semitransparent so you can locate the frozen ones and unfreeze them, then undo the transparency with right click?
I think maybe the key binding would be better as Crazy said, but yeah that’s the effect that would help. See I make a lot of structures using the monorail pieces, and recently had put a lot of tehm together, only had certain ones frozen, drove me crazy