Unfortunately since scrolling with the mouse wheel is still an unsolved problem under Mac Retina v25, I need to use the scroll bar at the bottom of the screen to quickly jump to a certain area of the score.
It would help greatly, if the scroll handle position would somehow show where it is in the score, so when I grab it I get a rough feedback of where I have to move it to get to a certain spot in the score.*)
Measure number don't really help as long as you don't remember them by heart.
*) maybe some sort of graphical mini-score like in Sibelius... hint, hint.