I am starting to understand some aspects of GD, and am actually having fun (most of the time)
I have had a few times where I wanted to either move all instances of specific sprite to a different part of the level, or change other things about them. When I have dozens of them, it is so time consuming, and sometimes difficult to select them all at once.
If there was an option to select one instance, or the original that is on the right side of interface, and right click to an option to “select all on screen instances”, that would be a HUGE time saver.