If I want to use geometry in another sketch as a visual reference only in a new sketch it is hard to avoid selecting the elements from the other sketch when you are in the newer active sketch. Turning off the ability to select sketch curves/points etc in selection filters removes the ability to select them in the current sketch as well.
It would be nice to able to right click on a sketch as an entity (or any body/component) to be unselectable but still visible. This has been possible in the past?