How can I get a subtitle under my name on my profile?

Short answer:

Use the 'Company Name' field in the Address section of your profile.

Dashboard > Account > Edit Profile > Address

Longer answer:

Many of our members use the 'Company Name' section of their public profile to help themselves stand out in our directory.

The circled words are pulled from the 'Company Name' part of their ProCopywriters profile.

You can either use it to display your company name, or you can use it as a sub-heading in your profile.