The actions for editing a registered domain are found on the domain's "Registration Details" page. On the Domains panel, click the "Manage" button in the "Registration" column for the relevant domain.
When a domain name is locked to prevent hijacking, it may not be transferred. Consequently, transfer-related actions will not appear if the name is locked. If you need to make these kinds of changes, unlock the domain first, and these options will appear in the "Actions" box.