Reservations without seat assignments can be auto-assigned to tables of a suitable size. There is an administrative setting under  Administration >  Settings >  Table reservations which determines how many seats may remain empty at auto-assigned tables.

1. Select the reservation in the overview overview on the  All reservations tab by left-click and hold down the Ctrl key.
2. Click on  Assign in the toolbar.
   Note: Only tables or table groups with a suitable number of seats are assigned automatically. For larger groups, tables must be assigned manually .
3.  Save your input by clicking on the icon in the top left-hand corner of the input window.