When hovering over Linked Fields or a file or image in a File Upload or Image Upload field, a fly-in panel showing related information appears on the right side of the screen.
To disable this fly-in panel, click the gear icon in the upper-right corner of the panel and select Turn off fly-in.
After clicking Turn off fly-in., all fly-in panels on the right side will be disabled. To configure settings individually for enabling or disabling specific types of preview information, go to Preferences under your Personal Settings.