Losing course when using the pan and zoom

I’ve had the Epix Gen 2 for a couple of years now and love it but still can’t solve this one problem… when I use zoom or pan and then try to get back onto my course I can’t! Ive setup a course, started following it fine, but then either go off the course by not paying enough attention or today because the trail was blocked. I use the pan and zoom to look around the map but then can’t get back onto my original course. What am I doing wrong? I’m sure it’s a simple fix but when you’re in the middle of the trail you start pushing all the buttons and I either zoom in more or out!!  I can move from the screen to the next but I can’t continue on the course I originally set. The only way around it for me is to stop the course and reload it again! A work around but not ideal. Thanks