Set up a digital ID
A digital ID contains your signature information. You can get a digital ID from a third-party signature handler, or you can create a self-signed digital ID.
Do any of the following:
To select a password-protected digital ID file, choose Document > Manage Digital IDs > My Digital ID Files > Select My Digital ID File. Select your digital ID, type the password, and click OK. To create a self-signed digital ID, choose New Digital ID File, and follow the prompts.
If you use Windows Certificate Security, choose Document > Manage Digital IDs > My Digital ID. Select your Windows digital ID in the list. To add a digital ID, click Add, and follow the prompts.
You may also want to:
Share certificate information
Sign a document

Signature Topics
About digital IDs and certification methods in complete Help