Dell UltraSharp 49 U4924DW 49" WQHD Ultrawide Curved Monitor - Manual (Page 71)

Operating the monitor
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PIP/PBP This function brings up a window displaying image
from another input source.
X X
X X
X X
X X
Sub-Window
Main Window
USB-C
DP
USB-C DP
HDMI 1
HDMI 1
HDMI 2
HDMI 2
NOTE: The images under PBP will be displayed at
the center of the screen, not full screen.
PIP/PBP Mode Adjusts the PIP/PBP (Picture in Picture/Picture by
Picture) mode to (50% - 50%), (PIP1
small), (PIP2 small), (PIP3 small),

(PIP4 small), (PIP1 large), (PIP2
large), (PIP3 large), or (PIP4 large).
You can disable this feature by selecting Off .
PIP/PBP (Sub) Select between the different video signals that may
be connected to your monitor for the PIP/PBP sub-
window.
USB Switch Select to switch between the USB upstream sources
in PIP/PBP mode.