Lock or unlock BPM via controler

is it possible to change lock bpm or unlock bpm via the controller? If with what comand?

There doesn’t seem to be a way to do this, at least no control for that is documented here: Control Index — Mixxx User Manual

There’s WIP which adds a control and some skin changes https://github.com/mixxxdj/mixxx/pull/3012

@ ronso is there also a bug report where I can vote?

@AndieY that feature is already being worked on, so there’s no need to vote for a bug