Typing hex digits

In hexadecimal mode, the digits A to F are typed with the keys that carry the teal letters, without pressing ALPHA. is the $\displaystyle y^{x}$ key, is the square-root key, is $\displaystyle x^{2}$, is $\displaystyle x^{3}$, is log, and is LN. The display shows them as A, b, C, d, E and F.

▶ Watch this step in the video (36:54)