When editing a file, you can lock this file. The lock has the following purposes:
The file lock informs other users that the file is currently being edited and might no longer be up-to-date.
If the file is located in a folder that you share with other users whom you granted edit permissions, those users can not edit the locked file.
If you are the owner of a shared file and another user locks the file, you can always unlock it.
How to lock files:
Select one or several files in the display area.
Click the icon in the toolbar. Click on .
How to unlock files:
Select one or several locked files in the display area.
Click the icon in the toolbar. Click on .
User interface:
Parent topic: Organizing Files and Drive Folders