When AC is missing library parts and the little dot shows up on plan, is there any way to see what library it came from so that it can easily be located. I can see the name that says 'elevator' for example but how do I know which library it came from?
Look in the menu Window - Palettes - Library Loading Report.
This will list all missing objects and give you the file path of where the object should be located (or was located last time the pln was opened).