Function Syntax: ExtendStartEndMultiple / dex / dexdebug Version: 1.1 Date: 20.06.2026 7:35:03AM https://www.lee-mac.com/doubleextend.html Description This AutoLISP program 3CORD generates a table of coordinates for the vertices of a selected 3DPolyline. It also marks the polyline vertices in the drawing with numbers or letters corresponding to the table entries. Functionalities: • Fills the table with coordinates of 3DPolyline vertices. • Marks vertices of the 3DPolyline according to the table data, using digits or letters. • Prompts the user to select a 3DPolyline. • Generates the coordinate table and allows inserting it into the desired location in the drawing. • Marks each vertex after table creation with matching figures or letters. • Provides customization options in the ADJUSTMENT section for controlling display and output format. • Works entirely within AutoCAD without requiring external files. • Supports polyline/circle selection. Use the WPS command or 'WPS inside an object selection prompt. • Program Description: 1. Pick polyline 1 near an end to get the end point. 2. Pick polyline 2. 3. Draw a connecting line. 4. Repeat steps 1–3 at the other end. 5. Use BPOLY to create a closed polyline. 6. Erase the temporary end lines. 7. Repeat steps 1–6 for as many cases as needed. • Lets you pick both reference points on an object first, then enter the number of copies to align, unlike the standard ALIGN command. • Erase all objects inside a closed polyline. • This program allows the user to extend both ends of all lines, arcs, and polylines in a selection by a given amount. – Command syntax: DEX (Double Extend). – Prompts the user to specify the extension amount, offering the last entered value as a default, which is remembered between sessions. – Allows selection of lines, arcs, open 2D polylines (light and heavy), or open 3D polylines in any UCS plane, including polylines with arc segments. – Automatically ignores cases where extension is geometrically impossible (e.g., arc endpoints meeting or overlapping). Important Commands & Variables: • 3CORD – Main command to run the function. • 3DPolyline – Object type from which vertices are extracted. • Table – AutoCAD table entity used to display coordinates. • ADJUSTMENT – Section in the source code where display and marking options can be configured.