The designer supports different modes of interaction with the diagram by mouse wheel or touchpad.
Check the Wheel Mode Example.
This is a default mode. You don't need to change anything to use it. In this mode the mouse wheel zooms the viewport.
Modern Mode (Pro)
This mode allows you to move the viewport by two fingers on the touchpad. The mouse wheel moves the viewport vertically. To zoom the viewport you need to press the CTRL button and move the mouse wheel.
This part of the article is available only for subscribers of the pro package. Buy the pro package to get an access to this part.
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