Can I add several persons at the same to an event? Or do I have to add them one at a time?

There is actually a way to add several persons at the same time. It requires that the persons are stored in the system. This is how you do it:

1. Create a query based on the persons that you want to add to the event
2. Process the query
3. Choose event
4. Choose what status you want the participants to have
5. Add