I’m still relatively new to Zappar, and I’m working to finish my second AR experience. Using the 2D Photo Feature subsymbol to implement a selfie capability is all that remains. Is there a way - without actually editing the subsymbol - to implement custom instructions? The existing instructions aren’t applicable, as there is no object for the user to directly manipulate. I simply want to allow them to capture the screen.
I don’t yet fully understand attachment points or inter-symbol communication, so I’m wondering if there’s some way to “hook into” the existing symbol and provide my own instructions. If not, I’ll just have to start hacking away at the symbol, but I was hoping to get this finished soon. 
Thanks for any pointers!