Adding annotation data to scan

I want to allow someone to attach notes to 3d locations within a scan during the scanning process.

Ideally, this could be done by picking points on screen using a touch gesture, but could also be done by placing a physical target with an ID into the scene like a QR code sticker.

In there capture session is there any support for either of these options? Can the session get touch gestures and project into the 3d space or capture a photogrammetry type target?