+The **System Settings** app covers platform administration: user management and invitations, permission assignment, datasources (including federated external databases), diagnostics and audit logs, and the **Marketplace** — template apps such as HotCRM install with one click and appear alongside your own apps. Setup holds no metadata editor: its metadata pages open Studio, and an installed app is customized there. Open the app in Studio and every change lands in its paired customization package (`hotcrm.custom` for HotCRM), created on your first change and exported and deployed like any package, while what shipped stays the vendor's. **Customize** on a view, dashboard, report or flow saves your version as an override of the shipped one, marked with the app it overrides, and **Restore package original** removes it. **Add field** on a shipped object adds your own field, named with a `__c` suffix, and a shipped field's label, description, help text, placeholder and option labels can be changed, nothing else. A shipped flow's switch turns it off for this deployment, and **New similar** copies a flow or a permission set under a new name; a flow's copy starts switched off.
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