hi i am new in this forum so hello to all members

i have builded a little site 3 month ago and it is slowlly showing up in search engine .

this site have subdomain and i am loocking to buy a domain name soon
so how to change the subdomain with new domain listening in all search engine


must i start over and resubmit my site again (using the new domain)

No, you don't need to start over, better use 301 permanent redirect so your subdomain will show the new domain (if you don't know how - search google on tutorials about it).

Good luck

thanks for replay i will check the tutorials