If you SharePoint Online environment is configured to allow the application of retention labels to files, and the option is enabled in MacroView DMF or Message, you can apply a retention label from the properties dialog.
When enabled, the properties dialog when save a file or viewing a files properties will include a drop down menu so that you can set the required label.
When viewing the properties of a file taht already has a retention label applied the drop down menu will include a None option to allow the label to be removed.
Enabling retention the label function
To enable the display of the retention label option on the properties dialog, go to Options > Appearance and check the Display retention labels setting.
- MacroView DMF /Message 8.9.349 or later
- SharePoint Online
For more information on retention labels see https://docs.microsoft.com/en-us/microsoft-365/compliance/retention