The Segmented Line tool functions like Line, except that you can continuously add additional lines by clicking the mouse. When you are done taking off lines, use the Finish option to stop the Digital Takeoff tool. You may also use the Break option to add another line segment.
If you have not specified a Drop Length on the toolbar, you will be prompted to enter the value.
You can use Drop & Continue from the right click menu to add the drop and two elbows and continue with your measured line.
Note: Deleting the Standard Takeoff item will also delete its corresponding Digital Takeoff annotation, provided that Digital Takeoff is connected.