how do I make the display portrait type from landscape?

[Nand Kumar Maharishi]

I have Lenovo Z51. BY my mistake the displaybecame horizontal(landscape type) from portrait type. how do I correct it?

 

[Ironsounds]

Hello... Right Click your Desktop-Screen Resolution-Orientation B / did that do it?

 

[Nand Kumar Maharishi]

Thanq very much Sir, I could do it with your suggestion.