Zoom extens

 From:  Michael Gibson
1622.3 In reply to 1622.2 
Yup, PaQ has the right one there - that will work the same as the reset button, it will zoom extents to the selected objects the first time you activate it, and if you do it a second time it will zoom extents to everything.

Let me know if you want the shortcut for zooming extents for just one single viewport instead of all of them, that is slightly different.

- Michael