Some services allow you to attend to multiple clients at the same time. Using Versum, you can schedule concurrent appointments to account for such scenarios. 

Tip: To prevent double bookings, a busy time slot is not shown in the online booking panel.

In order to schedule concurrent appointments, simply click a blank area next to an existing appointment where you'd like to schedule another visit:

A new appointment form will pop up. Enter all required information as you would with any other appointment (> More about scheduling appointments). The new appointment will be shown where it has been scheduled, next to the appointment added earlier on: