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The Draw menu - the drawing tools - points, lines, circles, arcs, ellipses, rectangles.
Each command has its own page - the tool in depth, its diagram, and links to the matching node and guide.
Select - select and move objects; shift-click to multi-select.
Point - place a point.
Segment - a finite edge between two points.
Line - the infinite line through two points.
Ray - a half-line from a start point through a second point.
Circle: Center Point - a circle by its center and a point on it.
Circle: Center Radius - a circle whose radius tracks another object's size.
Circle: Through 3 Points - the unique circle passing through three points.
Arc: Center, Start, End - a circular arc from center, start, and end points.
Straightedge - draw a construction line, tick the crossings you want, then hide the line.
Compass - draw a construction circle from a center and a point, tick its crossings, then hide the circle.
Compass: Radius - a construction circle whose radius is taken from an existing circle, arc, or segment.
Ellipse: Center + Axes - an ellipse from center, a major-axis point, and a minor-axis point.
Elliptical Arc - an arc of an ellipse.
Rectangle: XY-Aligned - an axis-aligned rectangle from two opposite corners.
Rectangle: Directed - a rectangle at any angle from two adjacent corners and a width.
Square - a square from two adjacent corners.
Regular Polygon: Edge - a regular polygon whose first side is the two points you click.
Regular Polygon: Center, Vertex - a regular polygon around a center, sized out to a corner.
Regular Polygon: Center, Edge Midpoint - a regular polygon around a center, sized out to the middle of a side.
Dimension: Linear - a linear dimension annotation (aligned, horizontal, or vertical) that follows the geometry.
Dimension: Angle - an angular dimension between two edges (or three points).
Dimension: Radial - a radius or diameter dimension for a circle or arc.
Label - a box of text on the canvas, typed in place and wrapped to the box you drew.
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