I hate to contradict someone directly, but I know for certain that you can add domain or subdomain to your panel and begin development without changing DNS in any way. In fact, don’t need to ever change the nameservers if you just want point the A record to your dreamhost server.
There are several threads on this board that describe adding hosting for a domain or subdomain first, and then changing the DNS later. This is, in fact, a key to minimizing the downtime for your domain.
Anyway, I just wanted to make sure the OP didn’t get any wrong information.
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