By default, when I create and launch a UWP app in Visual Studio, a debugging toolbar displays, as shown in Fig. 1.

Fig. 1

This can be useful during development, but it also can get in the way. It hides elements on my form and it does not look good during a demo.

Suppressing this toolbar is simple, but it took me some time to find it.

From the Visual Studio menu, select Tools | Options, as shown in Fig. 2.

Fig. 2

The Options dialog displays. Expand the "Debugging" section on the left and select "General", as shown in Fig. 3

Fig. 3

Within the Debugging / General section, clear the checkbox next to "Show runtime tools in application"

Click the [OK] button to apply these changes. The toolbar will not display when you run your project from Visual Studio.

To re-enable this toolbar, open the Options dialog and check the checkbox and click [OK].