It is possible that you do not want to capture a signature of someone because you already have his/her signature. If this signature is in one of the usual formats (bitmap, jpeg, png, etc.), you can use the Import signature function indicated in red to import it and display it on the card that you have opened in CardExchange® Producer. You can then save the signature in the database.
If you click Import signature, you enter a dialog window that allows you to select the signature file.
If you have found and selected the file, click Open and the signature will be displayed in the Image Editor window. Here you can crop the signature to the right size and perform any other editing operations.