Once you have created a Group Booking you have the option to create itineraries for a booking which will print out on the Event Form.

To create an itinerary, from the group booking screen select F11 - Itinry

A screen as shown below will be displayed.

From this screen you can free-type in the column labelled Description the text you wish to appear in the Itinerary section of the Event Form as in the example below.

In the columns to the left of the screen you can allocate the date and time of each activity/itinerary entry.  (These are optional fields)

When you have completed the itinerary, select OK to save the changes.