Lexis has made a number of guides and videos available to explain the new interface here. The PDF before and after guide is particularly useful for users of the old interface.
The heart of Lexis Advance is the unified search box. You can run natural language searches across the entire Lexis database from this box. You can also limit your search to specific sources or jurisdictions. Inside the search box there is a button labeled “Filters”. This button opens the following menu:
Using this menu you can select a number of categories to include in your search. For example checking Oregon under the jurisdiction tab and Cases under the category tab will limit your search to cases out of Oregon. The filters you have applied will appear at the top of the filters window.
You can browse the database of sources from the front page as well. At the top of the home page there is a black bar that contains a button called "Browse." Clicking on it opens an interface that lets you sort through the Lexis sources by various categories. You can also search the available sources using a small search box.
One last interesting feature is the ability to change the font and text size of results across your Lexis session. If you click on the "More" button at the top of your Lexis home page you will get a list of options that includes an option for "Settings."
Once you are in the settings menu you will be presented with a number of interface options. This will include the ability to change the font and text size of displayed documents.
If you would like any further help with Lexis Advance please stop in at the State of Oregon Law Library. We are located inside the Supreme Court building in Salem. You can ask for yours truly, Lewis Zimmerman. I'd be happy to show you around the new Lexis.