Mouse and card stacks

The corkboard is designed to be used with a mouse, but there’s no way to drill down through stacks of cards with the mouse. While I’m moving cards around with the mouse, I’d also like a way to a) temporarily fan out a card stack to see what’s in it, maybe by pressing a mouse button over a toggle point, and then have the cards re-stack when I release the button, and b) having the card stack open in its own corkboard using the mouse.

Right now, using the corkboard isn’t as fluid as it might be.
Unless I’m missing something, which is entirely possible.

Double-click on the document icon to drill down, click on the back button to return to the parent.
All the best,

I knew as soon as I pressed “submit” that I was probably going off half-cocked.