lock start/end & loop

I know you can lock markers, but I can’t see how to lock the loop/start/end locations on version 3. It’s a bit fiddly to have to keep moving them each time you nudge, or bring in reference material. I can see how auto relocating might be of use in certain instances, but not all.
Thanks in advance.

that would be a feature request, at tracker.ardour.org

Ok Paul,
Thank you for the swift reply.