Yes, I discovered that too -- that the macro keystroke had to be a control modified key. My problem is that my macro doesn't do anything even then. What had envisioned is behavior like Zoom In/Out in standard applications — let's say every time I press ⌃+ it magnifies further, and every time I press ⌃–. Actually I'd be content with something much simpler: I magnify the normal way, and ⌃0 snaps back to no magnification by control-scrolling down by a large number of pixels.