About the AVM4107 - 10" Widescreen HD Display
The AVM4107C offers four screen modes: full screen, split screen (SS), picture-in-picture (PIP), and pictureby-picture (PBP), also know as sideby-side. Full screen mode displays only one input signal and maintains the aspect ratio of the input source.
Split screen displays two input signals simultaneously; these images are positioned next to each other and stretched vertically to fit the screen.
Picture-in-picture also displays two inputs simultaneously, one in a large format and one in a smaller window whose position is configurable via the display setup menus.
Like split screen, picture-by-picture (or side-by-side) displays two inputs next to each other; these images, however, retain the aspect ratios of their respective video inputs. Excess screen space appears as black bars.