Is there a hand tool for xcode's storyboard (scrolling without scrollbars, PDF style)?

I guess the title says it all. I was looking for a way to e.g. hold down a modifier key and "grab" the storyboard so that I can stop trying to aim for the scrollbars every time I want to scroll freely with a mouse.

I found this key chart http://cocoasamurai.blogspot.se/2011/03/xcode-4-keyboard-shortcuts-now.html but it didn't help.

Smart Scroll will help you here. Though it has many features, one of it is grab and scroll, which is exactly what you need.

It depends on what type of mouse you're using, but on my magic mouse, I can scroll the storyboard in any direction by dragging one finger over the mouse.

You can also move it around with the command key and arrow keys:

⌘ → Scroll right

⌘ ← Scroll left

⌘ ↓ Scroll down

⌘ ↑ Scroll up

Note that you'd have to give the storyboard focus first, by clicking in a blank area.