Lengthen guidelines (only via end points)
Plant Engineering > Guideline Tools > Guide. 
> Lengthen guidelines (only via end points) 
Select this function to lengthen an existing guideline.
First, identify the end point of and existing guideline. As target point, identify the connecting point of a part or the end point of another guideline.
After specification of the start and end point, the C-edge alternatives dialogue window appears.
Select OK.to apply the guideline.
