"ExportLinetypes exports linetypes contained in the current drawing to a .lin file. All linetypes from the current drawing, together with any contained in external xrefs, are exported. The exported file can be modified and reimported using the LINETYPE command. The default export file has the same path and name as the drawing file but with a .lin extension. Unfortunately, this does not handle linetypes defined external .shx files, only those contained in the drawing itself.
Notes from Cadalyst Tip Patrol: Many of us use custom made linetypes. This routine makes it easy to get the line types from a drawing into a form where we can use them in our own drawings. Run the routine and pick the file name and location (if you don’t want to use the default name and location).