When we rotate the device in Unity, the following procedure is followed to set the screen to rotate accordingly.

• 1 - "Edit" opens.
• 2 - "Project Settings" opens.
• 3 - "Player" opens.
• 4 - The tab of the platform we are developing on opens.
• 5 - "Resolution and Presentation" opens.
• 6 - Select the one we want from "Default Orientation".

"Auto Rotation" is selected as the Default Orientation. If only portrait rotation is desired, select "Portrait" and "Portrait Upside Down".