First scan the signature into an electronic picture, and then import it into a picture editing software (such as PS, Flash, etc.). ) to edit, and then make it into a wmf file, and then import it into CAD.

It should be said that people who often draw CAD will design their own signatures, and this signature can be used in many places, not just CAD. It's not difficult to do. The key is that besides CAD, you'd better know at least one general picture editing software. To put it bluntly, this thing is nothing special, mainly to master some problems of format conversion. This signature cannot have a background, that is, it is completely transparent except for the lines of the font. Can be used in other programs.