If you are an editor, owner, or co-owner in a file or folder, you can modify the access levels of other collaborators.
To modify a collaborator's access level in a folder:
Open the appropriate folder.
You will see a list of collaborators in the right-hand sidebar.
Click a collaborator's name to to view all the collaborators in this folder.
Find the collaborator whose access level you would like to modify. You can search by name using the Filter Collaborators search box in the upper right.
Under the Permissions column, click the user's access level to modify it. Select the appropriate access level from the dropdown that appears. If the access level is greyed out, you may not have the necessary permissions to modify that user's access level.
To modify a collaborator's access level in a single file:
Locate the appropriate file
Click the Collaboration Iconto the right of the file name.
Alternatively, you can open the More Options menu and select Manage Collaborators.
Find the collaborator whose access level you would like to modify. You can search by name using the Filter Collaborators search box in the upper right.
Under the Permissions column, click the user's access level to modify it. Select the appropriate access level from the dropdown that appears. If the access level is greyed out, you may not have the necessary permissions to modify that user's access level. Note: Collaborators in single files can only be granted the Editor and Viewer access levels.