Santa Fe Layout

Would be most grateful if someone could give me a little advice please. I have not used Omeka for quite some time but have found myself back using it again (and I’m very glad about that) - its a good solution for my project. I’m using the Santa Fe theme as I did last time but I’m trying to get the layout to look like the layout in the theme gallery with recent items on the left and everything else laid out downward on the right (at the moment its all in a single column down the page. I seem to recall this is how I had it last time but I can’t recall how I did it or even figure out how I did it. If someone could point me somewhere I’d me most grateful Thank you!!