Making UI5 application take the full screen width

To make a UI5 app full width (i.e. not letterboxed), make sure you have sap.ui.fullWidth set to true in your manifest.json.

If testing locally (local index.html), it will also help to go into your shell initialization code had set appWidthLimited to false.

          new Shell({
              appWidthLimited: false,
              ...