If a food order has been put on table 1 and the drinks on table 2:
You can merge both tables into 1.
Most commonly used with big group functions to keep track of the drink spending & merged at the end.
POS ⇒ Floor View ⇒ MERGE ⇒ click on first table (ex: 1) ⇒ merge to another table (ex: 2) ⇒ that table 2 will now have all the items of table 1 + table 2