The variable listing at the top of the debugger window is very useful, but quickly becomes very large. It would be very nice if there was a search bar at the top of the listing, so that the user can type in the variable name he/she wishes to see the value of. In typical Mac style, the list would filter down, character by character, until it was small enough that the programmer can see the variable that he/she intends to view. This filter selection should also match inside of PHP arrays, and in fact should open the array dropdown so that the user can instantly see which part of the array matches the filter string that the user has provided.