Bluestacks 4 Rotate ScreenīrowserCam offers Screen Rotation Control for PC (MAC) download for free.
Press F12 two times in less than 2 seconds = Rotate 90º to the LEFT. Press F11 two times in less than 2 seconds = Rotate 90º to the RiGHT. Press F10 two times in less than 2 seconds = Rotate 180º. Press F9 two times in less than 2 seconds = Normal view 0/360º.
Make sure that 'Auto Rotate' on your Android settings is enabled. Just click on Rotate button to change the landscape to portrait and vice versa. You can change the screen orientation by clicking either of the 'rotate' buttons in that side panel. In the updated emulator you don't have to remember the keyboard shortcuts - they have added a side panel to the right side of the window.