Draw Select
Draw Select replicates the Mode, Line Type and Scale of a source Extension.
Pocket Doors
Extensions can be added to the edge of the leaf portion of the Pocket Door
Single Extensions
Extension Lines placed with the Single Extension command will pull from the closest extendable location rather than use the System/Project/Drawing setting.
This applies to extendable objects including Openings, Shapes, Solids and Posts.
This makes it easy to pull an extension from the center of a window and the edge of a garage door without having to change and change back the extension location configuration.
Splines
Extensions will not pull from Shape Splines or Solid 3D Splines.
Wall Joins
Extensions do a better job of remaining attached to wall materials as the walls move in and out of wall joins.