When you Google for things in the Dorico documentation, you may find yourself directed to documentation for older versions. When you arrive at the documentation page, take a quick look at the version number in the URL (it will say something like “/v4/” or “/v3.5/” in the middle of the URL) or at the version number shown in the top left corner of the page. It’s always worth checking that you’re looking at the manual for the current version.
My own preferred approach is to set up a custom search keyword in my browser so that I can type (in my case) “dh font styles”, for example, and this will search only the Dorico Pro 4 documentation. This page describes how to do it: