This is my yard throat, and the lead to the service area. The turnouts are all Fast Tracks, and I'm using their Bullfrog system to control them.
Obviously, the operator needs some way to associate the control knob with its turnout. I decided to do this by putting the track schematic on the fascia with striping tape, and placing the controls on the diagram. It's...somewhat successful. It can still take me a couple of tries to get the right turnout.
The result is that the underneath is a bit of a maze of control linkages:
One of the drawbacks of this scheme is that the location of the control knob is fixed, which means the linkage has to bend whichever way is required to get the the turnout. This is a problem for turnouts at the front of the benchwork, the control for which is at the bottom of the fascia -- the tube only bends so tight before it kinks. I solved this problem by mounting the Bullfrog facing backwards, and bending the tube around in a wide arc so it enters the Bullfrog from behind. However, I have a further restriction: I want the push-pull of the knob to be consistent with the throw of the points. Mounting the Bullfrog backwards violates that. To solve that problem, I have to introduce a bellcrank into the control path to convert "push" to "pull" and vice versa. The picture below shows two turnouts (the ones on the service lead) where I've done this. The controls are indicated by black arrows, the backwards Bullfrogs by blue, and the bellcranks by green. They are made out of whatever bits of soft metal I happen to have on hand (as you can see, one of them is a scrap of brass hinge):
