If you know the client you want to edit the client details for, find him in your full client list and click the blue "Client Profile" button:
From here you'll enter into the Client Profile where you can see all the details you have put in for the client:
To change or customize any of these details, click on the "Edit Details" link in the top right or blue button at the bottom:
This will bring up the "Edit Client Details" window where you can navigate between three tabs to customize the different parts of the clients info. The first tab is the "Basic Info" tab where you can make changes to the client's name, email address, company, or reset the password:
Underneath the Extra Contact Details tab, you can update the mobile phone number, home phone number, gender, and date of birth:
Finally, on the Address tab, you can update the listed address for the client as well as their timezone:
Once you have finished editing the client's details in the "Edit Client Details" window, click the "Save Changes" button at the bottom of the window to commit the changes and return to the Client Profile. You'll see that the Client Details have updated with the new information you entered:
Please note: When clients schedule themselves for an appointment, their client profile is created, but the only details that will be filled in are the ones that you asked for them to fill in on the Client Information screen of your scheduling process. If you want to change the information that is filled in by clients when they schedule themselves, simply refine what information you are asking for them to input.