Editing the length of entities  

You can change the length of entities or the included angle of arcs. Use any of the following methods to change the length of an entity:    

    Dynamically drag the endpoint or angle.

    Specify an incremental length or angle measured from an endpoint.

    Specify the new length as a percentage of the total length or angle.

    Specify a new length or included angle.

You can change the length of arcs, lines, and open polylines.

To change the length of an entity by dragging

   1   Do one of the following to choose Edit Length ():     

    On the ribbon, choose Edit > Edit Length (in Modify).

    On the menu, choose Modify > Edit Length.

    On the Modify toolbar, click the Edit Length tool.

    Type editlen and then press Enter.

   2   In the prompt box, choose Dynamic.

   3   Select the entity you want to change.

    4    Specify the new endpoint or included angle.