1. Log into your Plesk account page
2. Click on Domains and
3. Click on the domain name you wish to edit.
4. Click the Web Site menu and select DNS Settings.
5. Click on the A record to edit
6. Leave the “Record type” as A
7. In the Enter a domain name field enter your subdomain for example yoursite.com, enter signup in the field.
8. In the Enter IP Address field, enter xxx.xxx.xxx.xxx
9. Click OK.