Within Teamwork Projects you may sometimes need to lock a file that has been added to prevent other users from editing it.
To do this you must first navigate to the file section of the project.
You will then see a list of the files that have been added to this project. Select the drop down arrow to the right of the file you wish to lock and choose the Lock option.
Alternatively, you can click into the file itself and then choose the option button (three dots) to the top right of the page and then lock the file.
If a file has been locked and you wish to unlock it, click the blue key button to the right of the relevant file name in the list of files.
If you are viewing an individual file, the blue key option will appear beneath the file name.
Note: Only site owners/administrators and project administrators can lock or unlock files.
For more information see: Uploading files in the files area