J.P. Instruments EDM 930 Primary Pilots Guide - Manual (Page 7)

For Your Safe Flight Page 2
Display View Angle
The best view angle for the pilot is in the horizontal mode with the
buttons on the bottom. The best Portrait mode is with the buttons on the
right.
View angles are per the table below:
Horizontal Left 65 Degrees
Viewing Right 65 Degrees
angle Vertical Up 50 Degrees
Down 60 Degrees