The Groups can either be locked to guard against accidental
changes or unlocked when changes need to be made.
Step 1. Click the Groups Tab on the right hand
side of the main AutoBracket dialog.
Use the Lock/Unlock button located on the Groups View
in the lower right corner of the dialog.
Notice that when the Groups are locked, the button displays the words
Unlock Groups and the various groups buttons are grayed out and
unavailable for use as shown below.
Notice that when the Groups are unlocked, the button displays the words Lock Groups and the group buttons are available as shown below.