I would like to suggest changing the tiny x that will delete your layout- or maybe ask a follow up question. I have often been trying to quickly look through my layouts and accidentally hit the x, which very quickly deletes said layout! The only recourse is to exit program without saving. There is no undo, and if you aren't paying attention, you may not notice what just happened. I would prefer to right click to delete layout, just please make it a little bit harder to do on accident.