Lets you save more than one reference sheet (e.g. one per unit).
Add a worked example or a variable key to any formula afterward with its ✎ button.
Typeset notation: \frac{a}{b}, \sqrt{x}, \sqrt[3]{x}, r^2, x_1, and Greek like \pi \theta \Delta. Plain text prints as typed; use \_ or \^ for a literal underscore or caret.
Live preview — this is what prints (auto-fit to one page).