In SW Studio to zoom one needs to press the Ctrl-left-mouse. With other packages such as VisIt and ParaView zooming is can be done with the middle mouse or the scroll wheel. It would be great if that was enabled. More over for those with a single mouse button the Alt-left-mouse is in my experience used to scroll. That because at least with OS X a Ctrl-left mouse is the same as the Right-mouse which brings up a menu. This feature is true across most all apps.

That said I do notice in ParaView one can zoom with Ctrl-left-mouse but also Ctrl-left up down mouse with no movement will bring up menus. That latter feature is unique to ParaView as I have always seen under OS X a Ctrl-left-mouse down immediately bring up the menu.

Also the “Zoom” slider should be named “Views” because one is not really zooming but setting the number of views.