Modelling
Constraints and dimensions
Constraints fix how curves relate. Dimensions fix their sizes. When nothing can move any more, the sketch is fully constrained.
Horizontal / VerticalLines line up with the sketch axes. Added for you as you draw.
CoincidentA point lies on another point or curve.
Parallel / PerpendicularTwo lines keep their angle.
Tangent / CurvatureCurves meet smoothly (G1) or with matching curvature (G2).
Equal / SymmetricSame length or radius; mirrored about a line.
Concentric / Midpoint / CollinearShared centres, a point at the middle, lines on one axis.
FixPins geometry where it is.
Press D, click a curve or two, and type a value. Values can be expressions and named parameters, such as width / 2.
Something not working as described? See Known issues in the editor.