i which they would give you a side view so you could see the up or down hill putts better!!!! some times it says o with arrow goin up or down but how much if you had side view you might be able to tell better
Drag the aimer in an increasing circle around the cup to better visualise the actual break.
Generally if it says 0 up, i think of it as 1ft up, vice versa for down
Caveat: 0 down may be 2 up.