Keyboard shortcuts for displaying tooltips
It's amazing that you've provided keyboard shortcuts at all. Really. Great job. It makes the experience flow a lot smoother. However, it's an inconvenience to reach for my mouse to refresh my memory about an unfamiliar word after I've built some momentum. In addition to what's already provided, what do you think about a keyboard shortcut to display tooltips? If that word is unfamiliar to you, I'm talking about the popup that contains extra information when you hover your mouse over an item with a dashed underline.