Tap on each seat on the top to enter items for that guest.
When you have completed the entire order for all of the guests at the table, tap the Send button.
If you need to see the items you sent for a seat during order entry, tap on the seat, then select the menu from the top right corner of the screen, indicated by three dots (shown in the first screen example).
Select Show Sent Items.
Sent items will be shown with a green check next them (as shown on the second screen).