I'm trying to improve my macromanagment speed and I recognize that I never use the Alarm sound cues. There is a hotkey to jump to the last cue, but I can't quite figure out how it works. You can jump to the last alarm with Spacebar and an alarm can be if a unit was created, you were attacked somewhere, minerals or vespin gas resources are finished in one location, etc.
My first impression was that the alarm system works like a stack. The newest event will be put on top on the stack. If you press Spacebar, you will get to the top of the stack, then to the second element and so on. I thought that if I jumped to an element it would get pushed from the stack and I wouldn't be able to get to it anymore when pressing Spacebar. But it appears to loop. That means if I press Spacebar a couple of times and see the latest events and then do some other stuff, when I come back the same events are still in the stack.
Has anyone used the spacebar hotkey frequently and figured out how it works? Thanks!