How do I show the "up" and "down" arrow keyboard keys (←, ↑, → and ↓) in GitHub markdown? So far I am able to show up and down. But how do I show the arrow symbol instead the text "up" and "down"?
As mentioned in "Unicode in Github markdown", you need to use the decimal value of the characters you want.
In your case, the arrow symbols, as shown here:
←↑→↓