We have a number of pages to help you with all the actions you need to take before the athletes take to the track, covering numbering, check-in, call room, and seeding. Please see below for links to those pages, along with a short description of what each page does.
All the information on our massively customisable athlete numbering
Details on using whole competition check-in (check-in on arrival)
Information on how to use remote (pre-event) check-in
How to use call room features (single-event check-in)
A detailed page covering all seeding within OpenTrack
Information on how to progress athletes in an event with two or more rounds