How do I pin file/folders in Teams?
Pinning documents in Microsoft Teams is a simple and elegant way to keep your most critical documents visible for your team.
To pin a document, select it by clicking the circle on the left-hand side, then select “Pin to Top” in the toolbar.
You can pin a maximum of three files to the top of the Files list. To unpin a file, select the pinned file and click Edit Pin > Unpin.
You can also change the order of the pinned files if you have more than one by selecting the file and clicking Edit Pin > Move Left or Move Right.