Sometimes during reviews, you come across a kanji that you KNOW you recognise, and you have the reading/definition on the tip of your tongue. You don’t want to guess and risk an incorrect answer, but you also don’t want to sit there and stare at the same kanji up until WK times out and you need to refresh. And sometimes you feel that coming back in a few minutes to look at it again with fresh eyes will flip that switch in your mind you needed to remember.
What if there was a button to “Hold” a kanji for later on, so you can mull it over and come back to it a bit when you’re ready. Or even just to reshuffle it into later in the review. I feel like this would be a good function for when you want to say “I KNOW I can get this, but in the meantime I want to continue with the review”