In the Unnumbered Tables section at the bottom of the screen, click the option button next to the table that you want to assign.
Click on the table number at the top.
Repeat this for each group that you want to assign to a specific place.
Randomly assign the remaining groups to available tables
Click [ Auto Fill Remaining ].
Any groups that are larger that the limits on the remaining table chart will not be autofilled. In that case, change the limit on the remaining groups and then click [Auto Fill Remaining] again. Or you can manually place each group and update the limit as you place them.