The memory stylus buttons are located immediately below the RTA display screen. The row of twelve buttons (R, A, 1, 2, 3, 4, 5, 6, 7, 8, 9, PE) allows both control of what is viewed on screen, and the ability to store data in "Scratch" memories. The "R" toggles on or off the RTA display. The "A" controls the display of the Average curve. Stylus buttons 1‑9 alternately store, remove from display, and restore to display the contents of the nine Scratch memories. The "PE" controls the Preferred or "Target Curve" functions.

Tapping on any of the twelve buttons (R, A, 1, 2, 3, 4, 5, 6, 7, 8, 9, PE) more than once will turn them either blue, green, or buff from their original red color. The color red represents empty scratch pad memories; the color blue represents the most recent Scratch pad memory used; the color green represents any Scratch pad memory where data is stored (not empty) and IS displayed on screen; the buff color represents Scratch pad memories where data is stored but IS NOT displayed on screen. Any of the 9 Scratch pad memories as well as the "R", "A", and "PE" follow this color scheme for easy visual reference and organization. (Example: the example screen shot shows the Average "A" button and numbers "5" through "PE" as red because nothing has been stored in those Scratch bins. Buttons "1", "2" and "4" have memories stored and are displayed on screen... "4" is blue because it is the latest sample stored. The RTA "R" button and "3" Scratch pad button are buff because they are storing data but the data is not currently displayed on screen.)

Tap the "Memory" stylus button to access the memory management screen which allows you to store, load, and clear files from scratch memories.