Reader keeps glitching in that the page format goes weird and some of the menus etc are not accessible. I have to reduce it down via the taskbar to have any contriol. I have tried reinstalling but no effect. Any ideas?
Hope you are doing well and sorry for the trouble.
Is this an issue with a particular PDF file or with all the PDFs? Please try with a different PDF file and check.
What is the version of the OS and Adobe Acrobat Reader you are using? To check the version go to Help > ABout Acrobat and make sure you have the recent version 22.1.20117 (Win), 22.1.20112 (Mac) installed. Go to Help > Check for updates and reboot the computer once.
Also, it is difficult to understand the issue from the screenshot, A small video recording of the steps you are doing and the issue you are experiencing would be very helpful.