How to drive it: press a gold key (e.g. BLOCKS or PRINT), type how many on the keypad, hit ENTER. Dark keys (BILLING, KIT, LOGO, SSO…) switch things on or off — watch the indicator lights. Grey keys (LEVEL, STYLE, SIZE, SUPPORT) step through their options. The blue DEMO key loads a sample project to explore. Fill in Prepared for in the sidebar and it prints on the receipt. CE clears what you're typing, AC starts over. Your keyboard works too: digits, Enter, Backspace, Escape.