The following instructions are based on IRONCAD 2022.
In IRONCAD 2021 and earlier versions, the command locations differ slightly, but the operation method is the same.
When creating a continuous 3D curve passing through multiple specified points, use the [Line] or [Spline] command together with TriBall.

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Example: Creating a Line
[1] Click the Line command and specify the start point.
[2] Activate TriBall and move it to the next point through which the curve should pass.
[3] Press the [p] key on the keyboard.
This creates an intermediate (via) point on the 3D curve, allowing you to continue creating lines in different directions.
[4] Repeat steps 2 and 3 to continue adding points and extending the curve.
Please refer to the video below.
IC-001