Extending Line Lengths


The Line Extension command extends an existing line by a specified distance or alters the line to match the total length specified.

The line is extended from the end of the existing line that is closest to the selection point.

To extend an existing line

  1. Click Home tabDraw panelLine drop-downCreate Line By Extension.At the Command prompt, enter LineExtension.
  2. Select the line to extend.
  3. To define the length of the line, do one of the following:
    • Select two locations to specify the length that you want to add to the line.
    • Enter a positive distance to extend the line.
    • Enter a negative distance to shorten the line.
    • Enter Total, or T, and then enter the total length of the segment. You can either type the new total length, or select two locations to define the total length. This total length can be greater than (to lengthen the line), or smaller than (to shorten the line), the current length of the line.


Home tab Draw panel Line drop-down Create Line By Extension


Lines/Curves menuCreate LinesLine Extension

Command Line