I have tried searching and think I have found the answer, but still want to verify:
Am I right in assuming that Ardour can only snap to a pre-determined grid and not to other objects in the timeline?
I am not a composer, and I will not use Ardour for mixing music. I will use Ardour to edit audio for video, radio and ambience recordings.
This means cutting, splitting, moving segments around. So it would help a lot to be able to park the play head and snap to it or snap to other segments in the timeline.
Sorry if this has been answered somewhere else. It is sometimes difficult to search when you are not a native English speaker.