Go to Chart of Setup from the Employer / Setup drop down menu and click the Employee Listing Per Page link under Payrun Customisation section. Now click on the Edit button. Further select the number of employees from the Maximum Employees Shown Per Page drop down menu. Click the Save button to save the changes you made.
Road Map - Edit Employees Listing per Page
Employer/Setup -> Chart of Setup -> Payrun Customisation -> Employees Listing per Page Link -> Edit button -> Save button
( 'Employer/Setup' is the button positioned in the tasking zone menu at the top. It is the first button from the left)