GlobalUsageUI is a gadget which adds to the user interface the information of the global usage of each file. It displays a red label in the corner of gallery boxes, which, when clicked loads global usage information for all gallery boxes on the current page.
The Commons Global Usage Badges tool can be quite handy. Makes it a breeze finding files to prioritize for editing and review by adding a small red square beside gallery thumbnails which displays the number of articles linked to the file.
Enable it in Commons via: Preferences>Gadgets>Interface: Files and categories>Global Usage Badges.
Initially, when first viewing gallery pages (such as maintenance categories) one will see a "?" mark displayed beside all thumbs. Once one 'clicks' one of these "?" marked red buttons the gadget will be activated within the current gallery and will scan all entries. At which point the "?" marks disappear and a number (1+) in a red square will be shown beside only those files which are actually currently in use (0 = 'blank'). Scrolling over the numbered red squares then brings up a list of linked pages .
Best wishes y'all. Remember to be kind and considerate towards fellow editors and associated projects.