Learn how to create a subdomain in your Account Control Center:
This video will show you how to create a subdomain in the Account Control Center.
First, log in to the Account Control Center. Then go to the left sidebar and click Domains. In the drop-down that appears, click Add a Domain Name. Here, under Select a Domain Name, select Add Subdomain and enter the name of your new subdomain and pick a parent domain. Then, move to Select Hosting Type and choose a hosting type. If you choose Weebly Site Builder Hosting, you must also select a Weebly hosting plan.
I’m going to choose Parked Domain Hosting, because this hosting type requires an extra step. Now you’re going to click Proceed. If you did not select Parked Domain Hosting, this is the last step. However, if you chose a parked domain like I have, it will ask you what domain you would like to park this subdomain on. Select a domain from the drop-down, then click Proceed.
If created successfully, you will be taken to a page that shows you your new subdomain’s details.