Hi,
Thank you for reaching out here in the DocuSign Community.
Once you can only use one signature per envelope. If you want to add your middle initial to your signature, it has to be done for all of the signatures. You can change your signature by following the instructions from the article below:
https://support.docusign.com/s/document-item?bundleId=yca1573855023892&topicId=mrs1573855013078.html&_LANG=enus
If you are unable to change it, the reason and possible solution may be in the article below:
https://support.docusign.com/s/document-item?bundleId=yca1573855023892&topicId=tpz1620246007465.html&_LANG=enus
Keep in mind that if further assistance is required, you can always submit a support case to have one of our experts assist you by clicking the link below:
https://support.docusign.com/en/contactSupport
If you are not able to open the case on this page, you should scroll down to 'More Support Options' and select "I can't reset my password or don't have an account." you will have the option to fill out a form or calling Support.
Best regards,
Franklin H. | DocuSign Community Moderator