The 2nd and alpha shortcuts every student should memorize

Every key on the TI-84 has three labels: the primary key, the yellow 2nd function above it, and the green alpha letter above that. Most students use maybe 5 of the 2nd shortcuts and none of the alpha ones. Here are the ones that actually save time.

The navigation shortcuts

• 2nd + mode = QUIT. Closes menus, closes editors, returns to the home screen. Your escape hatch.
• 2nd + enter = ENTRY. Recalls the previous command on the home screen for editing. Press multiple times to cycle through your last ~20 commands.
• 2nd + (-) = ANS. Inserts the last answer (covered in VARS and Ans).
• 2nd + del = INS. Toggles insert vs overwrite in the editor. Default is insert.
• clear twice = wipes the current screen. Useful before screenshots or when memory feels cluttered.

Home-screen math shortcuts

• 2nd + x² = √(. Square root. Auto-paren'd.
• 2nd + ln = e^(. Natural exponential.
• 2nd + log = 10^(.
• 2nd + ^ = π.
• 2nd + ) = ] (closing bracket for lists and matrices).
• 2nd + ( = [.
• 2nd + ÷ = e. The actual constant, not a function.

Menu shortcuts

• 2nd + 0 = CATALOG. Alphabetical index of every function on the calculator. When you can't remember which menu something is under, look here.
• 2nd + 1 … 2nd + 6 = L1–L6. Statistical list access from anywhere.
• 2nd + 7 = L. Lowercase L for list operations in programs.
• 2nd + stat = LIST menu. Operations on lists (OPS, MATH, NAMES).
• 2nd + apps = FINANCE menu. Same as the Finance app launched via apps, but skips the selection.

The alpha layer

alpha turns every key into its green label — most commonly a letter. alpha + math gives you A, alpha + apps gives you B, and so on.

• 2nd + alpha = A-LOCK. Locks into letter-mode so you can type multiple letters without re-pressing alpha. Press alpha again to unlock.
• alpha + enter = SOLVE in the Solver (covered in Solver).
• alpha + (sto→) = { (opening brace for list literals like {1, 2, 3}).

Function keys

At the top, right above the screen, are y=, window, zoom, trace, graph. When a menu shows F1 F2 F3 F4 F5 at the bottom (e.g. the graph screen after pressing graph), those keys become function keys: y= = F1, window = F2, and so on.

This is how you trigger menu actions that don't have a letter shortcut — look for the F1–F5 labels in the software menu you're in.

The single most useful trick

2nd + enter (ENTRY) combined with arrow keys lets you edit your last calculation. This is the calculator equivalent of pressing up-arrow in a shell. Teachers sometimes mark students off for not "showing their work," so being able to flip back to a previous step and edit a coefficient is the fastest way to check your arithmetic.