Check out or check in files in a document library - Microsoft Support

Learn how check files, folders, and links out of your SharePoint document library, and check them back in or discard a check out.

Set up a library to require check out of files - Microsoft Support

SharePoint file opening read only in desk top app but edit mode in

Check out or check in files in a document library - Microsoft Support

Check Out SharePoint Library Files

Top questions about check out, check in, and versions - Microsoft

Using require check out option with Sharepoint makes local file

Check out or check in files in a document library - Microsoft Support

Checked Out Documents aren't appearing on Filter not equal to

View and edit information about a file, folder, or link in a