03Precision
When freehand won't do, drop a clean shape — nineteen of them, from plain lines to lightning bolts.
LineArrowDouble arrowRectangleRounded rectEllipseTriangleRight triangleDiamondPentagonHexagonOctagonStar6-point starParallelogramTrapezoidBlock arrowHeartLightning
Find itThe Shapes tool in the rail; the shape name in the style bar opens the full picker.
Use itPick a shape, then drag on the board to draw it. Set its colour and line thickness in the style bar like any other tool.
Edit pointsDouble-click a shape (or select it and press Edit points on its toolbar, or right-click → Edit points) and its outline shows its points: a square is a corner, a circle a smooth curve. Drag a point to reshape — a rectangle into a kite, a triangle into any triangle you need. Drag a small + between two points to add one there; on a line or an arrow, that bends it. Double-tap a point (or Make curve / Make corner) to switch it between a corner and a smooth curve. With a point selected, the arrow keys nudge it (Shift for 10px) and Delete removes it. Done, Esc, Enter or a click elsewhere finishes. Each change is one step of Undo, the colour, fill and thickness are kept, and a live class sees the shape change as you drag. Just looking changes nothing: a shape you open and close without moving a point stays exactly what it was.
Part of the Slate guide — or read the whole guide on one page.