The patient can see their information, upcoming and past appointments, consents, questionnaires, and pre/post treatment instructions. They can also view/edit their medical history as well as payment methods (this only pertains to cards on file if they are enrolled in a membership.)
The patient can also view what they have inside their wallet (dollar credits, products from a promotion/package, etc.) You do have to enable this setting if you want your clients to see what's in their wallet by going to Settings Gear> POS> Client Loyalty> Wallet Settings.
To edit the information, click on the Settings gear icon.