In order to update an employee's rate of pay, you need to access their Employee Details record.
To do this, either click on the employee's name if you can see it in the list (you start on the Employees menu), or just start typing the name in the 'Find an Employee' field.
Once you have accessed the record of the employee that you wish to update, select the 'Pay rates' option under the 'Pay run settings' heading and alter the pay rate/s accordingly.
If you would like a pay category to automatically be included in a pay run, tick the 'show in pay run' box as shown below:
Note: If an employee is linked to a pay rate template, you will not be able to update any of the pay rates directly from the employee file. Instead, you'll need to adjust the actual template (Payroll settings > Pay rate template page). Once you 'save' the changes made to the template, all linked employees will be updates.