To Perform a Key Priority Transition
Note: The KEY PRIOR functionality is not mapped to a button on the TouchDrive panel by default. You must assign this function to a
            button to be able to use the feature. Refer to User Buttons (TouchDrive Only) for information on setting up user
            buttons.
      Note: Key Priority transition can only be performed between keyers that are in the same state. For example, to change the priority of key 1 and key 3, both keyers must be on-air,
            or off-air, for the ME.
      - 
            Press KEY PRIOR on the Transition module of the Acuity® panel for the ME that you want to change the priority
               of the keys for.
            Tip: Press HOME > More > Effects > More > More > Key Priority if you have a TouchDrive control panel.
The KEY PRIOR button is lit, indicating a key priority transition is selected. If a key is not currently on-air, a warning is displayed.
 - Use the ME knob to select the ME that you want to change the priority of the keys on.
 - Press Current
 - 
            Press Current or Next and press the Key X buttons to set the order of the keys on the ME. Layer 1 is the bottom layer, with all other keys on top of it, and Layer 6 is the top layer, with all other keys beneath it. When
               the priority is changed, the remaining keys shift layers to accommodate the change.
            
- Current — sets the order of the keys now, even if they are on-air. Changing the current key priority of on-air keys may produce undesired effects.
 - Next — sets the order of the keys after the Key Priority transition.
 
 - Select the transition type you want to use (DISS, or WIPE only).
 - Perform the transition.
 
