Google has added an exciting new feature to Drive!
You can now lock files to prevent reviewers from making changes. Edits, comments, and suggestions can’t be added to a locked document.
To lock a file in Google Drive, right-click the file, select File information, and click Lock.
A pop-up window will confirm that you want to lock the file.
Note: Locked files can’t be edited, but users with edit rights can unlock a file.
For more information, visit the Google Workspace Updates webpage.