You can automatically select the number of people for a reservation.
At this time, this feature is available for adult options only using the
msm_int_adult parameter. We strongly recommend using this parameter with a destination parameter.
The example below directs users to London's destination page with a request for three adults:
Users who choose an activity will find the quantity pre-selected in the Availability and prices section:
If no valid options are available, nothing will be selected.