The STRETCH command relocates the object endpoints that lie across or within a crossing window selection.
In AutoCAD MEP 2025 toolset, STRETCH increases the length of ducts, pipes, cable trays, conduits, and plumbing lines, but it does not adjust connected objects and can break their connectivity. For this reason, use Lengthen grips, instead of STRETCH, to modify the lengths of segments. Depending on the editing mode you select, the Lengthen grips move or lengthen connected objects to maintain their connectivity. On unconnected segments, you can also use the Start or End grips to change both the length and angle of the segment. To stretch or change the angle of a schematic line, drag a grip point to a new location.