Select the Left to Pay button from the Financials dropdown to find out what money is still outstanding and due to be paid to you.
A list of all of your unpaid monies can be seen at the bottom under 2 tabs separated into Appointments and Sales
The Left to Pay dial splits monies owed between that due from appointments given and monies due from sales made.
Each tab will show monies relating to your
description of the service or product
amount that's still due to be paid
part payments will also be shown here
overall payment status - Unpaid or Left to Pay
It's very quick and easy for you to go into each client's view screen directly by clicking on the green clients' name link and then you can either give them a call, send them a message to ask for the payment.
Alternatively, send them an invoice with a link to make the payment if you have their email address.