When working with long polylines and splines, you may find it desirable to have persistent grips to help with visibility and printing. This LISP routine will create “point” entities at the endpoints and vertices of lines, polylines, and splines.
Start by loading the LISP file, run the command PRINTGRIPS, then select a supported entity. At each vertex, a “point” entity will be created on a new layer named “printgrip” for easy isolation and removal. You can easily modify this layer name and color to meet your needs. If you are interested in customizing this code, you’ll find it contains plenty of comments to help you.