If you plan to print your image, I recommend that you do all of your clean up work zoomed into 1:1.   You should also review all of your local adjustments at this zoom ratio to make sure that your edges aren’t obvious.    Here’s an easy way to move through your image while you are zoomed in so that you don’t miss any of it:

–  Zoom into 1:1  (by clicking on 1:1 in the navigator panel or Ctl/Cmd + twice)

– Press  the Home button on your keyboard to move to the top left corner of your image.

– Hit Page Down on your keyboard to move through the image one frame at a time.   The first time you do this, watch in the Navigator panel how the rectangle (viewing area) moves:  first down, and then to the right from the top down again.  Page Up takes you in the opposite direction.  End takes you to the bottom left corner.