I just wanted to suggest a small feature that could make reviewing a bit faster. I use the keyboard a lot when reviewing: I hide the answers, think about the question, press D to reveal the answers, and then use 1, 2, 3, or 4 to select the correct one.
Sometimes, a word is written entirely in kana, so I need to use the “Show Kanji Hint” button. Since I have to use the mouse for that, it interrupts my workflow a little.
Would it be possible to assign a keyboard shortcut to “Show Kanji Hint”, for example, R or T? I imagine other people who prefer keyboard-based reviewing might find this useful as well.
Regardless of whether this feature gets implemented, thank you for this wonderful site! It will be my main learning tool from now on.
There's actually been a huge number of keyboard requests over the last couple of years. I hope to do a batch of requests all at once, possibly in the next month or two. If you see a request for keyboard suggestions go out, please re-request it there :)