You want to edit or delete a document but the Properties icon is not showing up. The properties icon looks like a cogwheel
Documents are managed at the site level, so if you are not able to manage the document you need to go to the site where the document was uploaded to originally and where it now lives.
Identify the site the document is located on the listing page then go to the corresponding site for the document.
Notice above, when we are in the ACME Corp, the Properties icon for Ergonomic Injury Prevention is showing and the document can be managed here.
However, the Properties icon does not show for Health and Safety Policy - Rev 2 – 2015 since it is located at the "Toronto" site.