I purchased a domain through Google but I can't find the DNS settings page anymore. It used to be available from the control panel but not anymore. How do I access the DNS settings?
Login to your account.
On Tab Domain Settings, there's a sub section called "Domains"
There, you click on "Advanced Domain settings", which will take you to your domain services(ex: godaddy) console.
I am not sure if you could change the DNS settings right from your Google Apps console. I never saw that option. As far as I remember, this option was available at the GoDaddy's console page.