OSEE BCM-156-3HSV User Manual page 51

(1) Display Mode
This device provides four modes for picture & picture display: PIP, PBP,
and the relevant relationship of the two pictures are as shown in Figure
5.1-21:
 PIP (Picture in Picture)
The two pictures generated by two input signals separately are
displayed one in another. One is displayed on full screen, called as the
main picture, and the other is displayed in an inset window, called as the
slave picture. In PIP mode, the relevant position relationship of the main
picture and the slave picture is as shown in Figure 5.1-22:
Figure 5.1-22 The Position Relationship in PIP Mode
And you can adjust the display size by the PIP SIZE item, and there are
two kinds of outlines for the slave picture, as shown in Figure 5.1-23:
Figure 5.1-21 Multiple Inputs
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Functionality of the Main Menu