■Skill Slot Panel
The players can unlock the Skill Slot Panel to add a third Skill Transfer slot.
■Skill Switch Panel
The players can unlock the Skill Switch Panel to add Sub-slot(s) where Skills can be saved.
In addition, for each one that is unlocked, one Sub-slot will be added to each Skill Transfer slot.
-Based on the number of Skill Switch Panels that have been unlocked, the number of Sub-slots available in Skill Transfer slots will increase.
-A Skill Transfer slot with Sub-slots available will have a 
symbol appear next to them.
-In addition to the Equipped Sub-slot, other Skills may be saved to any extra slots.
-Skills saved to Sub-slots with the symbol may be used collectively in Skill Transfer slots.
-If an Archetype is changed using an Arch-Selector or an Arch-Shifter, any Skills in Transfer slots that are the same as the Awaken Skill will be removed. However, Skills in Sub-slot will not be removed even if they are duplicates.