IMatch Viewer - "Hold Zoom"

[Darius1968]

The "Z" key toggles between two different views:  100% View, and Fit-To-Screen View.  Wile in the Fit-To-Screen View, it's possible to click the left-mouse-button, with the cursor hovered over any specific part of the image, which will in turn, zoom into the image, at around the point, corresponding to the cursor.  With this in mind, would it be possible - if the keyboard shortcut doesn't already exist - to assign a keyboard shortcut that would allow this current zoom-level to persist, once I release the left-mouse-button, instead of having to manually zoom and pan to this point of interest, at the zoom-level that I want, all over again? 

[JohnZeman]

While you are in the viewer if you double click the image it should toggle from zoom to fit to 100% and stay there until you double click an image in the viewer again..