To improve sketch usability when having to deal with multplie references, I suggest PTC to add two additional buttons in sketch mode.
1. Hide existing references
2. Show all references
Hiding the existing references, would allow to easily deal with more complex sketches. Hiding the references, would not delete them (obviously), but would simply declutter the screen, and most importantly, let the solver ignore those references when snapping to references. After we use some references, snapping or constraining the geometry to it, the solver should have the option to ignore those references when sketching new geometry, or have a smaller data set of references to try to snap geometry to.
This would also have the benefit of avoiding to acidently snapping to the wrong geometry, as shown in image 6 and 7.