Four patterns to recognize
There's no single "In-Place Editor" screen. You use it whenever you see one of these patterns:
Inline control in a list or grid – e.g. a dropdown or date picker inside a cell. Click it, change the value, and (on save or blur) the row updates. You never leave the list. Example: Content Grid status, author, date.
Button that opens a panel or drawer – e.g. "Theme", "Language", "Column manager", "Edit user". Click → panel/drawer opens over the current page. Edit, then Save (or Apply) and Close. The page behind is unchanged. Example: Theme Management, User edit.
Settings section in the same page – e.g. Settings → Appearance. You're already on a settings page; you change brand name or logos and click Save Settings. The request goes to the API and the UI (e.g. sidebar brand name) updates without a full reload. Example: Appearance.
Widget or block on the same page – e.g. Growth Score on the dashboard. You add or edit events and weights inside that widget; save or recalculate. You stay on the dashboard. Example: Growth Score.
Mental model: "I'm here. I need to change X. I open the thing that edits X (panel/drawer/inline). I change it and save. I close or just continue. I'm still here."