If you want to show more than one signal in the same window or even in the same coordinate system, SIGVIEW offers two different views:


"Parallel" view where signals are shown in the same window on top of each other (for example, for typical EEG or ECG signal view):


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"Overlay” view where signals are shown in the one coordinate system.

 

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Creating Overlays


There are two ways to create these views:


  1. Select several windows in Control Window and then select “Show selected in one window” or “Show selected as overlay” option from the context menu (right mouse click in the empty part of the Control window).
  2. Use the context menu of the signal or overlay window to add other signals to the overlay.


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Each signal already included in the overlay will be represented with a different color and its name in the context menu. You can distinguish the color of different signals if you take a look at the Control Window. The color of the link between the signal window and overlay window will always be the same as the color of that signal in the overlay window.

 

You can change the order of signals in the overlay window by pressing the Ctrl+Z keyboard shortcut. In “parallel” view, the order of signals will be shifted; in “overlay” view, the colours of the signals will be shifted.


You can switch between “parallel” and “overlay” view anytime by pressing the Ctrl+S keyboard shortcut.


Note: If windows and their signals have different length or units, SIGVIEW will try to show all of them in the same coordinate system in the overlay window - of course, this does not mean that the units shown will be valid for all signals. The coordinate system will always be taken over from the first signal, the red one. By shifting the signals order using the Ctrl+Z keyboard shortcut, you can view the coordinate systems of other signals too.


Zooming in/out in overlay windows


You can use the same zooming functions as on other signal windows, including mouse-wheel functions. Any zooming function will directly affect origin windows taking part in the overlay.