1, first open the tool software, "File"->; Open an image or scheme. Import signed photos.

2. secondly, click "image"->; "conversion"->; "24-bit RGB->; Gray scale ". Click "Vector"->; Select decimal ID”- > automatic vectorization.

3. Then select "CAD graphics"->; "boundary line"->; "Start". Click "file"->; Output vector (e). Save. Dxf file. Click "OK".

4. Finally, find the location where the dxf file is saved, and you can get the electronic signature of the CAD version.