BB Code Manager 
To edit your existing BB codes or perform tests to ensure they function correctly, go to Custom BB Codes > BB Code Manager. At the top of this page you will see a list of your custom BB codes.

Below this you will see an area to test your BB codes.

This is equivalent to making a test post on the board to ensure that everything works correctly. However, you do not actually have to make the post public!
User Contributed Notes: BB Code Manager