On a Mac using Acrobat Pro DC the user interface is huge. All the icons and toolbars are huge and hog too much screen space. Where are the settings to make the entire interface smaller? The interface takes up way too much space.
Hope you are doing well and sorry for the trouble.
Have you started experiencing this issue recently?
Would you mind sharing the version of the OS and the Acrobat DC you are using? To check the version go to Help > About Acrobat and make sure you have the recent version 22.120142 installed. Go to Help > Check for updates and reboot the computer once.