If you need to display a special message for all potential volunteers visiting the Open Requests page, use the Message of the Day.
Navigate to the Control Panel > Services Tab. In the Website Modules section, click Switch to View Mode to see a link to Volunteer Self-Signup.
Click Volunteer Self-Signup.
The Message of the Day and Email Open Requests buttons will only display for administrators.
Click Message of the Day to use the text editor and add a message. The message displays above the list of requests.