Enter a new display rule and tap Add.
Note: The new display format is assigned the lowest priority by default.
Changing the priority of a display rule
Tap to select a display rule and then tap 
to move the priority one level up, or 
to move the priority one level down.
Editing a display rule
To edit a display rule, tap the one you want to edit and tap Modify.
Deleting a display rule
To delete a display rule, tap the one you want to delete and tap Delete.