Splines are defined either with fit points or with control vertices. By default, fit points coincide with the spline, while control vertices define a control frame. Control frames provide a convenient method to shape the spline. Each method has its advantages.
How to activate the spline command in AutoCAD:
1. Command method
2. Toolbar method
First, you must change the workspace to Drafting & Annotation. READ HOW TO CHANGE WORKSPACE.
Spline Control Vertices (CV)
1. Click Home Tab
2. Click Draw
3. Click Spline CV Logo
Make a Spline in AutoCAD:
2. Create First Point, specifies the first point of the spline, either the first fit point or the first control vertex, depending on the current method.
3. Next Point, creates additional spline segments until you press Enter.
4. Undo, removes the last specified point.