To sign up to volunteer, scroll to the date or event you would like to volunteer for (or use the small calendar on the far left of this screen), then select your choice of assignment and click the large SIGN UP button to the left of the date.  If you have used the system before, you will be asked for your username and password.  If you have not used the system before, click the 'Register' button to complete a user profile and then you may proceed with registration.  In many cases, the buttons to 'Register for This Event' and then to confirm your registration are located at the BOTTOM of the screen so don't forget to scroll down to the bottom of a page.

To cancel an event you have registered for, click 'Sign in' in the upper right corner and log in with your username and password. Then click the large CANCEL button to the left of the date you need to cancel.