I have a model with several sketches that ultimately control some geometry wwwaaayyy down stream. And I want to change several of the dimensions in the sketches and then rebuild. (so I don't have to wait each time I change a dim.) It seems that most of the time, I change a dimension and the model automatically rebuilds. Some times I change a value and the system waits for a CTRL-B or Q. Is there any logic around when it waits for my instruction and when it goes off on its own? Is there a way to force it to wait until I say "go"?