If you are not familar with the Interactable Component, first have a look here Interactable Component.
Choose the Select
from the Input Actions list so the interactable triggers on the (Front) Stylus Button. That's all 🙂 When you select the Menu
it will trigger when you press the BACK Button.
Good news! You don't have change anything. If the Input Action is set to Select
of the Interactable Compontent where the PressableButton is attached to, it will react if the Stylus Tip presses that button. There you go 🙂
A good reference for the pressable buttons is MRTK Pressable Buttons
Good news 🙂 You don’t have to change anything.Just have a look here to see how the MRTK Bounding Boxes work → Bounding Box