how to give centre line to oblong hole

Heres a Tutorial for you

  1. Step 1:

    After you have sketched your oblong hole start the "Drafting Module"

  2. Step 2:

    Select the "Insert" tab then "Centerline" then "2D Centerline" option

  3. Step 3:

    Change the type to "By Points"

  4. Step 4:

    Select "Arc Center" of first Arc

  5. Step 5:

    Select "Arc Center" of Second Arc

  6. Step 6:

    Change the "Extension" to make centerline pass the arc

  7. Step 7:

    Or "edit" the centerline and move the "handle" manualy

  8. Step 8: