Short description
🧩 AddVertex2Mleader is an AutoCAD AutoLISP utility that adds a new vertex point to a selected MULTILEADER object, helping CAD users adjust leader geometry quickly without rebuilding the annotation.
Command:
🚀 Main command: AddVertex2Mleader
Type AddVertex2Mleader in the AutoCAD command line, select a MULTILEADER object, then pick the point where the new leader vertex should be added.
Description:
📝 AddVertex2Mleader is a compact AutoCAD LISP command for editing multileader geometry by inserting an additional leader vertex into the selected leader line.
The routine prompts the user to select a MULTILEADER entity, asks for a new point, reads the existing leader line vertices through Visual LISP COM methods, and rebuilds the vertex list with the picked point inserted near the closest existing segment location.
This is useful for CAD annotation cleanup, Civil 3D drafting corrections, drawing coordination, and fast leader adjustment when labels need to be routed around objects, xrefs, dimensions, hatches, or congested drawing details.
Helper function: (if any)
🔧 Internal helper: ip
The helper function processes the flat coordinate list returned by getleaderlinevertices, groups coordinates into 3D points, measures the distance from the picked point to existing leader vertices, determines the insertion position, then returns a rebuilt vertex coordinate list for setleaderlinevertices.
Functionalities:
• 🎯 Selects one AutoCAD MULTILEADER entity from the drawing.
• 📌 Prompts the user to pick the new leader vertex point interactively.
• 🧠 Reads the current leader line vertices using getleaderlinevertices.
• 🔄 Inserts the picked point into the leader vertex sequence instead of recreating the whole MLeader manually.
• 📐 Uses distance-based logic to place the new point near the closest existing leader vertex position.
• 🧩 Updates the first leader line using setleaderlinevertices.
• 🧹 Leaves unsupported selections unchanged when the selected object is not a MULTILEADER.
• ⚙️ Uses Visual LISP ActiveX automation with vlax-ename->vla-object and vlax-invoke.
Result:
✅ The result is a faster AutoCAD multileader editing workflow: the selected MLeader receives an additional vertex point, making it easier to create clean jogs, route leader lines around drawing content, and improve annotation readability.