Corona debuger F11 not working

In sublime text the corona debuger says F11 is a shortcut to step over.  However in OSX F11 is the lower speaker volume key.  How do I prevent the OS from intercepting F11?

System Preferences -> Keyboard

Make sure to check “Use all F1, F2, etc. keys as standard function keys.  When this option is selected, press the Fn key to use the special features printed on each key.”

System Preferences -> Keyboard

Make sure to check “Use all F1, F2, etc. keys as standard function keys.  When this option is selected, press the Fn key to use the special features printed on each key.”