Center Line

The center mark tool is designed to create an associative center line entity between lines or line segments.
To create a center Line:

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If you move an associated line or line segment the center line will move with the entity. However, if you move the center line separately you will disassociate it from its related entity.

Properties

Show Extensions: Sets whether the extensions of the center line is shown or not.
Start Extension: Sets the distance the start of the center line will go beyond the average length of the two of the associated lines or line segments.
End Extension: Sets the distance the end the end of the center line will go beyond the average length of the two of the associated lines or line segments.