Uniden UNVR85x4 User Manual page 17

To create a new layout, click Add Layout.
Add Layout Screen
Enter the Layout Name and select the number and type of split
screens desired. Split screens include standard split and wide
screen split. Standard split screens display in 16:9 aspect ratio
and wide screen pictures display in 1:1 aspect ratio. Select the
duration of stay for rotating channel previews under Dwell and
then drag and drop the channels to adjust the layout.
Add Layout Screen
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