Here something that I´d find useful, I´v found that when "zooming-in" graphs its over mouse position, but when "zooming-out" its from the center of the screen. Most software "blender, AutoCad, 3DMax, etc,.." that have "zoom over mouse position" works zooming in AND out from mouse position thus allowing the user to quickly navigate zooming out to a particular direction.
Changing this simple behavior would be a super usability trick! What do you think?
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