I like to work and iterate on an infinite canvas and let my ideas evolve over a large area. This is very useful for me but finding by way back to important areas is hard and cumbersome. Being able to define important areas (call it points of interest, landmarks, or whatever), giving them a name and showing me these in a list for easy tap-to-navigate navigation would be great.

In addition, one could (optionally) see these areas/points overlayed when zoomed out for a better and more visual overview.