iOs set Storyboard orientation to landscape

I wish to set View Controller's orientation as landscape in Storyboard. I referred the below links but couldn't find the "orientation" option anywhere (screenshot attached) enter image description here

Links referred:

Designing in landscape with Storyboards

iOS 7 XCode 5 Storyboard set orientation to Landscape

What is the proper orientation of a storyboard?

Vertical orientation can work for nearly any layout. Horizontal/landscape can be used for image-focused storyboards or even those that balance image and descriptive text.

In xcode 8 the option to change the orientation is not from Inspector, you will be able to change the orientation from bottom bar, please check the screenshot

enter image description here