To create a tangent (that is, a line segment tangential to a specified edge), on the Geometry toolbar, click Tangent (). You can also right-click the Geometry node to add this node from the context menu. Then enter the properties of the tangent.

Select the edge you want to tangent in the Graphics window. Only one edge can be selected. The edge appears in the Edge to tangent list.

Click the Active button to toggle between turning ON and OFF the Edge to tangent selections.

Parameter start guess is a number between 0 and 1 that specifies where on the edge the expected point of tangency is located. The tangent returned is the first tangent found starting the search from the start guess.

Type of tangent specifies how the endpoint of the tangent is specified. There are three options: Edge–edge, Edge–point, and Edge–coordinate.

When the type is edge–edge, you use the Graphics window to select a second edge to tangent. The edge appears in the Second edge to tangent box. The line segment created is tangent to both edges. Use Parameter start guess for second edge to specify the start guess for the second edge, it is a number between 0 and 1. Click the Active button to toggle between turning ON and OFF the Second edge to tangent selections.

When the type is edge–point, you use the Graphics window to select a point in the geometry as a tangent’s endpoint. The point appears in the Point list.

If you want to make the resulting entities contribute to a cumulative selection, select a cumulative selection from the Contribute to list (the default, None, gives no contribution), or click the New button to create a new cumulative selection (see Cumulative Selections).

Select the Resulting objects selection check box to create predefined selections (for all levels — objects, domains, boundaries, edges, and points — that are applicable) in subsequent nodes in the geometry sequence. To also make all or one of the types of resulting entities (domains, boundaries, edges, and points) that the resulting objects consist of available as selections in all applicable selection lists (in physics and materials settings, for example), choose an option from the Show in physics (Show in instances if in a geometry par; Show in 3D in a plane geometry under a work plane in a 3D component) list: All levels, Domain selection, Boundary selection, or Point selection. The default is Domain selection, which is suitable for use with materials and physics defined in domains. For use with a boundary condition, for example, choose Boundary selection. These selections do not appear as separate selection nodes in the model tree. Select Off to not make any selection available outside of the geometry sequence.