A subtle but powerful feature tweak in AC10 is the addition of the 'Previous' option for ghost story display. Very simply, it shows the last story you were on as ghost.
Now you can go back and forth between the basement and first floor, e.g., while always keeping the other story in sight.
Here's a somewhat lateral tip. Use previous to show either the story above or below without using the Stories or Go To Story dialog at all. To show the story above as ghost, just go up and then immediately down (Cmd+6, 5). For the story below, down then up. Very quick, and habit-forming.