Options are provided to control the relative size and appearance of the breakline symbol and an extension of the polyline beyond the selected start and end points.

Command: BREAKLINE
Block= BRKLINE.DWG, Size= 0.5000, Extension= 0.1800 Pick first point for breakline or press <Enter> for options: Specify a point or press ENTER for options

Options

Pick second point for breakline: Specify the second point for the line
Pick location for break symbol <Midpoint>: Specify the point on the line segment to specify the location of the breakline symbol, or press ENTER to use the midpoint of the line

How to create a custom breakline symbol:

1) Draw the breakline symbol:

2) Make the Defpoints layer current. If it does not exist, create it and make it current:

3) Use the POINT command to place a point at each location where the line will connect with the breakline symbol. Use only two points.

Create a new block using the objects created in steps 1 and 3:

Command: block

Start the BREAKLINE command, press ENTER to get the Options prompt, and use the Block option to specify the new block.

Command: breakline