This could be a nice feature for C2 or C3, when browsing through the layouts list, show a small preview image of the layout on the properties tab, it's somewhat frustrating locating a level layout in a list of 100+ layouts, you have to open them one by one and it takes a lot of memory and then you get a limit message when you're over 30 or something layouts.
This can be a simple screen capture by demand (click on set preview image), no need for fancy triggers and conditions.