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5.4 window operation
5.4.1 Shortcut window operation
Step 1
：
Select the desired signal from the list of sources or devices.
Step 2
：
After holding down the CTRL key and clicking the mouse and dragging in the window
management area, the window opening action is completed.
Step 3
：
Window restrictions. If a single header is entered on a single block control card, the
number of window overlays is 4 layers. If the input is double-headed, the number of superimposed
Windows is 2 layers. The following images are the most window cases.
Case 1:
Case 2:
