To reuse a storyboard, could I simply copy it from one project to another project (then make modification to the storyboard as required)?
Method 1
Select the View Controller in the storyboard and press Command + C to copy. Then press Command + V to paste in the second storyboard. Check the document outline to see where it was pasted to.
Method 2
Right click the storyboard file in the Project Navigator and select Open As > Source Code. Scroll down the XML code until you find your View Controller. It will look something like this:
...
Copy this and paste it in the second project's storyboard file.
Notes