To Create a Constructed Cylinder
By using the Cylinder option, you can construct a cylinder as a Best Fit through three or more parallel lines.
1. Click > 
Cylinder. The CMM Construct tab opens.
Cylinder. The CMM Construct tab opens.2. Select the parent reference Csys from the Parent Csys drop-down list.
3. Select 3 or more measure or construct steps of the following types:
◦ Line
◦ Cylinder (axis)
◦ Cone (cone axis)
4. Click OK.