To keep your work forever

• Click Export (↑ in the toolbar) any time → save as PNG or PDF to your device.
• Exported files are the only permanent copy. Auto-save is a safety net, not a backup.

Shortcuts

• Tools: P Pen · H Highlighter · E Eraser · V Lasso · L Laser · hold Space to pan with any tool
• Aids: R Ruler · T Protractor · O Compass
• Endless or pages: a notebook is one or the other, chosen on the start screen. An endless board grows to the right and down as you write (no pages to add); a paged notebook is A4 sheets, landscape or portrait. To switch, use New notebook… at the bottom of the Board / Page menu.
• Hand: grab a note, stamp, picture or tidied shape and drag it; dragging empty board pans. Space + drag always pans.
• Notes & stamps: X Note · Y Stamp. Pull a note's corner to resize it freely — sideways reflows the words, downward adds room, a corner pull scales the letters.
• Hold to shape: draw a rough circle, line, square, rectangle or triangle, then keep the pen down and hold still for half a second — it tidies itself. Keep holding and pull to adjust — a line's end follows the pen, a circle grows, a box corner resizes it, a triangle corner moves (right angles stay 90°). Lift to keep it. "Keep sketch" in the toast undoes one.
• Pictures: press and hold the pen on a pasted picture (~½ s) to select it again, or tap the picture chip on the page pill · then drag / resize / rotate, ✕ or Delete to remove (undoable)
• Pages: N New · C Clear (Undo in the toast) · PageUp / PageDown navigate · Delete page from the ⋮ menu
• Sizes: 1–5 jump · [ / ] step
• Edit: ⌘/Ctrl+Z Undo · ⌘/Ctrl+⇧+Z Redo · Esc deselect
• Zoom: ⌘/Ctrl + scroll · ⌘/Ctrl+0 fit width · ⌘/Ctrl++ / − step · tap the % for 100%
• Pages strip: the grid button on the page pill shows every page — tap to jump, drag to reorder, ⋯ for duplicate / move / delete
• Panels: K Calculator · M Chemistry — periodic table with element cards (facts · shells · 3D atom · CAPE orbitals), molar mass, equation balancer, ions & formula builder, solubility & tests; every view stamps to the page, and a ✎ on a molar-mass, equation or formula stamp reopens it to change and re-stamp in place · CSEC/CAPE toggle in the panel bar · J Physics labs (Measurement Lab, gas lab) · ? this sheet · drag a panel by its bar, double-click the bar to reset it
• Ruler & protractor: R / T insert · drag the ⋯ grip (or a finger on the body) to move in any tool · both ruler edges snap the pen · Shift+drag the rotate handle to snap to 0/30/45/60/90°