Reply to Help ITCH pros: How do you key lock

I used ITCH back in 1.3 something and than went to Traktor. for video purposes Im back to ITCH (and enjoying it) the only thing I cant find is how to key lock. Sometimes I do very drastic transitions where I sync the tracks together and drop like 30 BPM but the key warps so it sounds weird.

please help. thanks!!