---
GuiCommand:
Name: Sketcher ConstrainRadius
MenuLocation: Sketch , Sketcher constraints , Constrain radius
Workbenches: Sketcher_Workbench
Shortcut: **K** **R**
SeeAlso: Sketcher_ConstrainRadiam, Sketcher_ConstrainDiameter
---
The Sketcher ConstrainRadius tool fixes the radius of circles, arcs and B-spline weight circles.
See also: Drawing aids.
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Make sure there is no selection.
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<small>(v1.0)</small> : If the **Dimensioning constraints** [preference](Sketcher_Preferences#General.md) is set to {{Value|Single tool}} (default): press the down arrow to the right of the **<img src="images/Sketcher_Dimension.svg" width=|x16px><img src="images/Toolbar_flyout_arrow.svg" width=x16px>** button and select the **<img src="images/Sketcher_ConstrainRadius.svg" width=16px> Constrain radius** option from the dropdown.
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If this preference has a different value (and in {{VersionMinus|0.21}}): press the
Constrain radius button.
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Select the Sketch → Sketcher constraints →
Constrain radius option from the menu.
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(v1.0)
: Right-click in the 3D view and select the Dimension →
Constrain radius option from the context menu.
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Use the keyboard shortcut: K then R.
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For further steps see Sketcher ConstrainRadiam.
The Sketcher scripting page explains the values which can be used for ArcOrCircle
, and contains further examples on how to create constraints from Python scripts.
⏵ documentation index > Sketcher > Sketcher ConstrainRadius