R2V's powerful Auto Vectorize function converts CAD drawings to DXF, IGES, and other formats in just a few seconds.
R2V supports multiple layers exactly the same way as CAD systems do.
R2V can handle very large size drawings. One major aircraft manufacturer has used R2V to vectorize a 180" by 48" drawing with just a single command. They tried other packages but R2V is the only one that does the job.
If you have a large number of drawings, you can use R2V's batch processing function to process them together with one command.