Constraints in sketches

The tools in the Sketch > Constraints panel let you constrain sketches by controlling the relative position of sketch geometry in Fusion.

You can use these tools to constrain sketches:

• Horizontal/Vertical
• Coincident
• Tangent
• Equal
• Parallel
• Perpendicular
• Fix/UnFix
• Midpoint
• Concentric
• Collinear
• Symmetry
• Curvature

Note: Before you can create sketch geometry, you must use the Create Sketch tool to create a new sketch, or right-click an existing sketch and select Edit Sketch to enter the Sketch contextual environment.

Horizontal/Vertical

The Horizontal/Vertical tool constrains a single line, or two points, to lie on either the horizontal or vertical axis, whichever is closer to the current alignment.

Coincident

The Coincident tool constrains the position of two points or a point and a line or curve together.

This could be a point constrained along a line, two points constrained to each other, or a point constrained along a curve.

Tangent

The Tangent tool constrains a curve and another object so that they touch at a single point but never cross each other.

Equal

The Equal tool constrains similar objects so that their sizes are identical. When the size of one object changes, the others adjust, too.

Parallel

The Parallel tool constrains two lines so that they extend in the same direction and never intersect.

Perpendicular

The Perpendicular tool constrains two objects so that they lie perpendicular (at a 90-degree angle) to each other.

Fix/UnFix

The Fix/UnFix tool locks the size and location of a point or object.

Midpoint

The Midpoint tool constrains a point or object to the midpoint of another object.

Concentric

The Concentric tool constrains two or more arcs, circles, or ellipses to the same center point.

Collinear

The Collinear tool constrains two or more objects so that they share a common line.

This could be a line and a rectangle, where the line and one edge of the rectangle lie along the same line.

Symmetry

The Symmetry tool constrains two or more objects so that they are symmetrical (identical to each other in relation to a common axis).

Curvature

The Curvature tool constrains a spline and another sketch curve to create a smooth, continuous G2-continuity curvature between them.