This shows Add star item in the right-click menu. It also can be accessed by 1. clicking the desired documents. 2. Then clicking the three dots in the top menu bar and 3. selecting Add star from the menu that appears.
Google Drive Add star
This shows Add star item in the right-click menu. It also can be accessed by 1. clicking the desired documents. 2. Then clicking the three dots in the top menu bar and 3. selecting Add star from the menu that appears.