The generate button will produce the default move based on the first and second round seating when the "stay at each table" is set to 1 round. Where pairs (or players) stay at the table for more than one round select that option before using generate.
The [All Tables] button will apply this text to all the tables in the movement.
Click [Cancel] to discard any changes and [OK] to save the changes. Even so the whole movement must be saved before these changes are permanent.