Toggle Non Proportional View
Toggles the view of the current window between proportional and non-proportional scaling. This only has an effect if you have first non-proportionally scaled the view.
No other aspects of the camera view are changed when using this tool.
Access this tool from the View palette:
Toggle Non Proportional View workflow
Once you have created a non-proportional view with the Set Non Proportional View 
, you can use Toggle Non Proportional View to switch back and forth between your non-proportional and proportional view. No other aspects of the camera view are changed when using this tool.
is displayed in the lower left hand corner of the window when the view is non proportional.When saving the file, both the proportional and non-proportional views are saved, and the toggle still operates properly after the file is re-opened. This is also the case when saving only the window layout with Layouts > User Windows > Save Current Layout and retrieving it with Layouts > User Windows > Retrieve Layout.