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4.1.16 Change Semaphores

Cht: Semaphores 0/1 [tracktype]

This sets all signals to be light signals (if 0) or semaphores (if 1). Optionally you can restrict the conversion to the given track type. Note that to see the semaphores, the "semaphores" option has to be turned on and you must have loaded the semaphore graphics.