Dimension sketch geometry

Learn how to add dimensions to geometry in an active sketch in Fusion.

Design > Sketch > Create > Sketch Dimension

Create a dimension

1. In the Design workspace, create a new sketch or edit an existing sketch to enter the Sketch environment.
2. On the toolbar, on the Sketch contextual tab, select Create > Sketch Dimension.
3. Select sketch geometry:
   • Single lines, parallel lines, or two points create linear dimensions.
   • Non-parallel lines create angular dimensions.
   • Circles create diameter dimensions.
   • Arcs create radius dimensions.
4. Define the value of the dimension:
   • Enter a specific value.
   • Click an existing dimension to reference it as a parameter.
   • Enter a mathematical expression that contains values, parameters, or a mix of both.
5. Press Enter to accept the value or expression.
6. Move the mouse pointer away from the geometry, then click to place the dimension.
7. Optional: Repeat steps 2-3 to create another dimension.
8. Press Esc or start another command.

The dimensions display in the canvas. Any sketch geometry that is constrained by the dimension displays black.

Edit a dimension

1. Double-click the dimension.
2. Enter a new value or expression for the dimension.

Convert a driving dimension to a driven dimension

1. Right-click the dimension you want to convert.
2. Select Toggle Driven.

The dimension is converted to a Driven dimension. If the expression only references Driving dimensions, it is converted to a static value, and cannot be recovered by toggling the dimension back to Driving.

Convert a driven dimension to a driving dimension

1. Right-click the dimension you want to convert.
2. Select Toggle Driving.

The dimension is converted to a Driving dimension.

Reference a driven dimension in another dimension

1. In the active sketch, add a new dimension or double-click to edit the value of an existing dimension.
2. Refer to a driven dimension:
   • Click a driven dimension to reference it directly.
   • Enter an expression that includes the parameter name of a driven dimension.
3. Press Enter to complete the value.

The computed value for the dimension updates to reflect the value or expression that references the Driven dimension.

Tips

• Before you place a dimension in the canvas, right-click to access contextual options for it. Examples:
  • Radius or Diameter
  • Driven or Driving
  • Pick Circle/Arc Center or Pick Circle/Arc Tangent
• From the Browser, right-click a sketch and select Show Dimensions so you can easily reference dimensions in another sketch.
• From the Parameters dialog, you can also reference the parameter name of driven or driving dimensions in other sketches, modeling features, and parameter expressions.