1. In Reservation view click 'Edit'.
2. Click Actions list icon in top right corner and select 'Add Product'.
3. Select the Product you want to add in the dropdown and enter how many items you want to add to each selected room.
Select the rooms you want to add the product to. You can use 'Search' or 'Sort by' to filter your selection. Search searches on room category or room number. Sort by can order the search result by Room Category, Room number, Arrival date or Departure date. Click 'Apply' to add the products to the selected rooms.
4. Click 'Save' in the top right corner of the reservation to save the changes.