To do so, go to the Booking Overview page and click on the Manage Booking arrow -> Modify Booking arrow and select Add Guest.

Or go to the Guests tab, the Additional Guests card and click on Add a Guest.

Then, a drawer opens in which you can enter the information. Finally, click on Add.

1. Open the relevant booking and go to the Guests tab.
2. Click "Add Additional Guests" at the bottom right.
3. Use the + / – buttons to adjust the number of Adult or Child guests.
4. (Optional) Enable and set Extra Guest Fee if applicable.
5. Click "Add" to save changes.