To Lengthen a Duct Segment

1. Select the duct segment and click the Lengthen grip.
2. If the segment is connected to an object on the end you selected, specify whether and how to maintain connectivity:

   To...	Maintain connectivity	Then...
   adjust only duct fittings and segments and retain the current locations of parts	yes	proceed to the next step.
   adjust all objects, including parts	yes	press Ctrl.
   break connectivity	no	press Ctrl twice.

3. Specify the segment length:

   To...	then...
   specify the new total length	press Tab to activate the input field for specifying the resulting dimension, and enter the new length. Press Enter.
   specify the difference between the current length and new length	drag the cursor to begin lengthening or shortening the segment, and enter the change in length in the input field that is active by default. Press Enter.
   specify a new endpoint	drag the grip to the endpoint, and click to specify the point.

   Tip: To use the dimension input fields, enable dynamic input ( on the application status bar) and the Dimension Input drafting setting.
   Note: Flexible ducts do not have lengthen grips.