Design Concept [Work in Progress]

I've tried a lot of sketching apps. They're all good for drawing, but they're all designed for working on one image at a time.

I want an app for sketching storyboards, where you can zoom out and work across different frames, and then zoom in to edit one frame. Other features would be kept to a minimum.

Specific scrolling actions allow viewing 2 frames side by side easily.

Magic Copy Paste! You can already do this from a Mac to an iPad, but I want to paste across multiple frames all at once.