What is the difference between "Marker" and "Tap" in choosing placement methods?

Options for selecting placement - Marker or Tap.

When starting an Insight session, the user is asked to choose where their holographic content will be placed. The options are "Marker" or "Tap".

• Marker - A special QR marker can be printed out and placed on the floor where you wish to locate the center of the holographic content. Choose the "Marker" option, then stand over the marker and look down at it.
• Tap - Look at the floor where you wish to locate the center of the holographic content. Tap to tick the box.

NOTE: All participants in a shared session will need to select their placement. For best results, have everyone use the same procedure.