In System Settings, you can customize your iMac and adjust its settings to suit your needs. For example, you can add a screen saver that can also become your wallpaper, manage and share passwords, change the brightness or resolution with Display Settings, adjust Accessibility settings, and more. You can also download the latest software update.
To start, click the System Settings icon , then move your pointer over the password to reveal it. You can also edit or delete as password, or click , choose Move Passwords to a Group, then select the accounts you want to share and click Move.
Customize Control Center and the menu bar. Choose which settings you want to appear in Control Center Customize your Mac with System Settings in the macOS User Guide.