I've been testing the arrows on a Macbook for a while now and they've been visible and clickable on my end. Perhaps there's a specific resolution on your laptop which is causing the arrows to be amiss on your side?

Could you kindly tell me what your screen size is? Even knowing what model and size your Macbook is would be a nudge in the right direction.

For reference's sake, I'm using a MacBook Pro (15-inch Early 2008).

Also, this is a screenshot of how the arrows appear on my screen.
!Screenshot-2018-7-20%20Private%20Getting%20Started.png!
