You can join two planar curves with a connecting curve.
Before you begin: Open an existing 3D shape containing two curves.
Select the two curves to be connected.
In the Radius area, enter a radius value.
Click Apply.
The corner is previewed with handles at the circle center, the constant radius limit
(the segment between the two solid radius lines), and the contact points. To
make the contact points visible, click Contact Points
in the App Options panel.
Modify the Radius value.
Select Single Segment to impose a limited number of
control points for the corner curve, thus resulting in a single arc curve. In
this case, the generative circle is not displayed, only the contact points.
Select the resulting curve type.
Trim: Creates a three-cell curve limited to the
initial curves endpoints.
No Trim: Creates the corner arc only limited
at the intersection with the initial curves are not modified.
Concatenation: Creates a mono-cell curve limited
to the initial curves endpoints.