Texas Instruments TI-84 Plus Silver Edition - Page 7

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There are two other important keys: The 2
nd
key and the ALPHA key. Notice that each
key on the calculator has blue writing above it (on calculators other than the TI-84 Plus,
this may be a different color), and most keys have a green letter or punctuation mark
above it. When the function given in blue is needed, press the 2
nd
key, then the button
that has the required function above it. So, for example, to access the square root
function, press 2
nd
2
x
. Similarly, to access letters of the alphabet, press ALPHA and the
key that has the desired letter above it.
2
nd
Key
ALPHA Key