This tutorial assumes you are already logged in to WebsitePanel
Now let's learn how to create a subdomain in WebsitePanel
1) Select the plan you want to add a subdomain to

2) Now, click Domains
 
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On this screen, you can see your added domains, subdomains and the number you have remaining

3) Click Add Domain
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4) Select Subdomain
 
5) Enter a name for your subdomain

6) You can select the top-level domain this subdomain will belong to

7) When you are finished, click Add Domain
 
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You can edit the subdomain you just added

8) Click Save
 
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This is the end of the tutorial. You now know how to add a subdomain in WebsitePanel