windows 8.1 auto rotate

[Reber]

hi  guys , i have hp stream 7, i upgrade to windows 10 then i downgrade to windows 8.1 pro N  with clean install but now auto screen rotate option is not exist . what can i do ?

[GuiltySpark]

Try the Winkey+O (Winkey = key with windows / flag on it)

Hold down Winkey and press O it should toggle the auto rotate on / off.

Failing that go to Charms Bar (right hand side) and select Brightness.

Left Mouse Button the Screen Icon at the top of the Brightness slider.