Go to Settings → Clinic → Advanced. Only users with every permission (the Owners group) can open this tab.
Change what you need and click Update at the bottom. The button stays greyed out until you change something. Changes apply right away for you; other users get them the next time their page reloads.

⚙️ General

🧑 Patients

📅 Appointments

With Force New Appointment With Cancel on, appointments with no patient (for example blocked time) can’t be cancelled. Turn it off to cancel those.
🦷 Operations

🛡️ Insurance

See Insured patients for the approval steps.
📦 Inventory

🔳 QR Code Settings

✍️ Patient Signature

All are off by default. To create forms, see Templates.
🚫 Disabled Features

- Lab Orders: hides lab orders from the side menu, the + menu, the dashboard and the patient file.
- Encounters: hides encounters from the side menu, the + menu, the dashboard, the patient file and the questionnaire settings.