Parts of an activity that don't belong to your workout

When you do a workout your watch continues after the actual workout.  For example when you planned a workout of 10km you have to be very lucky to press the stopbutton at exactly 10km.  Usually you'll see around 2 seconds after the actual workout.  I would be nice if you could delete those 2 seconds by editing your activity.  And it might be even more interesting if you could delete other parts in the middle of you activity.  For example, you planned a workout, an intervaltraining and after a while you realise it's not your day and you want to skip a few intervals, but still do your cooldown.  It might be interesting to be able to delete the laps of a few seconds between the moment you decided to call it a day and your cooldwon.  I hope someone from Garmin reads this and takes it into account.