Customized List form shrunk to left hand corner

https://powerusers.microsoft.com/t5/user/viewprofilepage/user-id/152118

The cause was not identified so my resolution was to re-publish the last working version and update it to include changes lost in the corrupted version. 

I posted in another forum and https://powerusers.microsoft.com/t5/user/viewprofilepage/user-id/152118 told me to try the below steps.  I can’t say if they work or not; I’d already published over the corrupted form version when the suggestion was delivered.  Hope their steps work for someone else!

1. Adjust the web page zoom to 100%
2. Refresh the webpage(Press F5)