Lets you save more than one reference sheet (e.g. one per unit).
No formulas yet — load a template, browse the library, or add one below.
Add a worked example or a variable key to any formula afterward with its ✎ button.
Printed across the top of the sheet, so the page can be vouched for on a desk.
Live preview — this is what prints (auto-fit to one page).
Click "+ Add" on any formula to add just that item to your current sheet.