What's a "Primary Form"?

One form per event must be designated as its "Primary Form".

You do that by selecting the This is the primary form for the event check box on the form's Setup page. (See Plan > Forms > Setup.)

If your event has only one form, it is automatically the primary form.

Note: To change which form is the primary, select this check box for the new one, which automatically clears it for the original.

This is useful when you want to view the primary form from an external website, such as an online calendar.

A report will show the Primary Form Name and Primary Form URL values (if those columns are included in the report).

And in the Event List, you can click   to preview an event's primary form.

Some aspects of a primary form are used in other places. For example, the Add to Calendar options on the Confirmation page of the primary form are also used for the "Add to Calendar" dynamic field when it's used in an Email Template or in a form's Personal Agenda section.

Caution: Deleting/inactivating a form does not remove the Primary Form designation. If you are not viewing inactive forms on the Forms List, you may not be aware that a primary form is still set for an event.