This differs per competition, depending on how the competition organizer sets up the competition.
For most competitions, it is not possible to enter a personal best, Athletics.app will automatically fill in the best performance. If it is possible to enter a personal best, this will be visible during the registration process. Even before you complete your registration, you will be given the option to enter a personal best for all the events you are registering for.
This has been automatically translated into English
