Setting a base rate of pay for a position means that any employee assigned to that position will automatically be paid that rate. So if you pay all new dishwashers $10.00/hour, there's no need to add a rate of pay to individual employees.
Go to the Positions tab and click one of the positions in the list.
Next, click the Wages tab and then click in the Base wage field to add the rate. The Effective from date will default to the current date, but if you are adding a rate after you've added shifts, you may need to backdate the rate so labor cost will be calculated correctly.
Click Save at the bottom of the page and the wage will be applied to all employees assigned to the position without an individual wage in their profiles.