You can add a trigger action that prevents users from performing file events and displays a message to inform them why they cannot perform the event. For example, you can prevent users from checking out files in specific workflow states.
1. Choose Tools > Administration > Triggers.
The Triggers dialog box opens.
2. Click Add.
The Add Trigger dialog box opens.
3. Enter a Trigger Name, select the Trigger When events, and select the Preconditions. See Adding triggers.
4. Click the Actions tab and click Add to add an action.
5. Select Prevent the event with [message] from the Action list.
6. Enter the Message to display when users attempt to perform the event and click OK.
Note: If the trigger prevents a promote or rebase, you can leave this field empty to skip files during the promote or rebase without displaying a message for each affected file. The skipped files are not displayed in the promote or rebase preview.
7. Select Disable trigger after it runs once if you only want the trigger to run once.
8. Click OK to add the trigger.