This might not be a right name... But I thought of something:
-> When you select ,in the score, something that has to do with a specific part (like a stave, a note or even the part's name) this will also select the corresponding box of the part in the mix. For example: I select a note in the flute part... This will navigate me to the flute "box" in the mixer IF the mixer is visible. I'm telling this because whenever I want to hear one instrument alone (S(solo) I mean) ,and the space for the mixer does not allow for every instrument box to be visible all the time, I have to search the mixer and find the instrument I want... And it's really boring when the score is for 20+ parts.