Are you a drawing or a design document?

Generally, first sign by hand, take photos or scan it into an electronic version.

If you add it to a CAD drawing, you generally need the following three steps.

1, put the photo signature in PS to remove the shadow.

2. Import R2V software to generate DXF files.

3.DXF files are filled into entities and saved in blocks, or converted into DWG.

Use software R2V (free) CAD (online piracy is available).