Samsung VG-PRSP120S/ZA The Premiere 120" Rollable Screen (2022) - Manual (Page 25)

24
Insert the adjusting rod into the Yellow hole in the housing and
rotate clockwise
(rotate one circle and adjust the screen height about 2cm)
1 2
Only applicable after the black border is
adjusted too low！
Open the rubber plug under
the left side of the cover
3