问题
Storyboard has a horizontal scrollbar for you to scroll to view other scenes, but the scrollbar is not present when previewing the storyboard scene. How do you scroll storyboard preview? (Assuming I am not using magic mouse)
回答1:
What about Shift + Mouse Scroll? Or if you have Macbook, slide two fingers left or right on trackpad to scroll.
回答2:
Just press and hold on the edge of the preview.
来源：https://stackoverflow.com/questions/33714764/how-to-scroll-storyboard-preview