Function Syntax: AddVertex2Mleader Version: 0 Date: July 21, 2011, 03:51:26 PM Version: 1.1 Date: 20.06.2026 6:38:51PM https://www.theswamp.org/index.php?topic=6383.15 Description 🧩 AddVertex2Mleader is an AutoCAD AutoLISP utility for adding a new vertex point to a selected MULTILEADER object. The command helps CAD users adjust leader geometry quickly, create cleaner annotation jogs, and improve drawing readability without rebuilding the multileader manually. Function Syntax 🚀 Command: AddVertex2Mleader Type AddVertex2Mleader in the AutoCAD command line, select a multileader, then pick the point where the new leader vertex should be inserted. SEO Optimized Description 📝 This AutoCAD LISP command edits a selected MLeader by inserting an additional leader vertex into the existing leader line vertex sequence. 📌 It is useful for annotation cleanup, Civil 3D production drawings, label routing, drawing coordination, and fast leader adjustment in congested CAD details. 🧠 The routine reads the current multileader vertices with Visual LISP COM methods, calculates where the picked point should be inserted, and updates the leader line automatically. Functionalities 🎯 Select MLeader - prompts the user to select one AutoCAD MULTILEADER entity. 📌 Pick new vertex point - asks for an interactive point that becomes the new leader vertex. 📐 Distance-based placement - compares the picked point to existing leader vertices and inserts it into the vertex sequence near the closest position. 🔄 Update leader geometry - applies the rebuilt vertex list with setleaderlinevertices. 🧩 Preserve existing MLeader - modifies the selected multileader instead of deleting and recreating annotation content. ⚙️ Visual LISP ActiveX workflow - uses vlax-ename->vla-object and vlax-invoke for MLeader vertex access. Important Internal Logic 🔧 Internal helper function: ip The helper converts the flat vertex coordinate list into 3D point groups, measures distances from the picked point, determines the insertion index, then returns the rebuilt coordinate list for the MLeader. Practical Result ✅ The final result is a selected AutoCAD multileader with an additional vertex, allowing clean jogs, better annotation routing, and improved label readability in production drawings. Notes and Limitations ⚠️ The uploaded routine works only with MULTILEADER entities and updates leader line index 0. ⚠️ The command does not include a DCL dialog, batch processing, or an explicit undo group. Use AutoCAD UNDO if the vertex placement needs to be reverted. Tags 🏷️ AutoCAD 🏷️ AutoLISP 🏷️ Civil 3D 🏷️ MLeader 🏷️ Multileader 🏷️ Leader vertex 🏷️ Annotation cleanup 🏷️ Drafting productivity 🏷️ CAD automation 🏷️ Visual LISP 🏷️ ActiveX 🏷️ Drawing annotation