Runco RS-900 Owner's Operating Manual page 27

9. Picture-In-Picture (PIP) Controls:
ACT
Press to switch to the active window in PIP mode.
PIP
Press to activate PIP mode.
PIP+
Press to enlarge the PIP window.
PIP-
Press to shrink the size of the PIP window.
10. LENS
Press to access the lens shift controls.
Runco RS-900 Owner's Operating Manual 13
Controls and Functions