scaling

if you are using a USB camera, download and install Picolay. This allows you to stack multiple "slices" of focus into one picture giving you a larger depth of field.  For example in this picture you would continue adjusting focus, snap a pic, focus more snap a pic, until you had say 5-10 pictures, then let picolay stack them into one. This way you would have an image with the front green arrow and the white arrow in the back both in focus.  Hope this helps.