Occasionally, an Adobe PDF document will have an option for you to attach a digital signature. 

Click the field you’d like to sign and the following dialog box will appear.  Choose to create a new digital ID now.

Select Windows Certificate Store, Next

Complete the form with your work information and leave the settings as-is. Click Next:

Save the Signature File to the location of your choice; we recommend your V: drive.

Enter the desired password – which if forgotten cannot be retrieved, and click Finish.

You can now use your signature or modify its view (Appearance drop down menu).