Samsung 1501MP/1701MP Owner's Manual page 24

Setup - Installing a VESA base :
The monitor may be reclined from 0 to 90 degrees. When fully folded (reclined), the base becomes a
handy holder for moving the monitor around.
1. Reclining Monitor
1. The monitor may be reclined by approximately 15 degrees without pressing the FOLD button.
2. You need to press the FOLD button to raising the monitor over 15 degrees.
Pull the Rear Supporter for safety when reclining the monitor backward from 90 degrees.
Using the FOLD button