Preview and Resizing in Xcode 6.3

问题

I am using Xcode 6.3, but I am not able get preview and Resizing button. The resizing button should be present at last in the attached image.

There is 4 buttons in this panel before xcode 6.3

I am not able to see the last button of the following image:

So how can achieve that 4th button?

回答1:

Ok there is no option Preview and Resize in xcode 6.3....

If you want to check constraints then the option is Document outline and for preview .... just check below..

first select show assistant editor....the left and right panel shows controllers....

and now follow this image

来源：https://stackoverflow.com/questions/30030591/preview-and-resizing-in-xcode-6-3