If I press 'start anesthesia' before pressing "start" on my pre-meds, then the GA sheet starts at the anesthetic start time. Then, if I press the arrow to the previous screen (i.e. before the anesthesia start time) the pre-meds are not shown there, and therefore, I cannot move my initials to the actual time given).
This is why I feel it would be useful to be able to edit all of the timers on the pre-operative screen (i.e. premeds, induction, procedures, etc).