Is there a way to mirror a vertical tablet screen on a landscape monitor?

When an Android tablet is connected to a large-screen monitor to display content, the vertical screen of the tablet is usually projected onto the horizontal screen of the monitor, creating large margins on the left and right.

One solution to this problem is to use an app such as Rotation Control to fix the tablet's screen orientation to the side.

Rotation Control (Google Play)

Horizontal fixation using Rotation Control

After installing the Rotation Control app, open the app and start controlling rotation.

Then, on the home screen, turn on the Guard mode and Landscape mode as shown in the figure so that the entire screen can be fixed in landscape orientation.

This setting ensures the Cloud Signage app stays in landscape mode when opened, adequately fitting a landscape monitor.