yes I made the the page a linked above like this. But I’m not talking about a page I could add normaly. I’m talking about the portfolio category- or tags- result pages. The pages which are shown if I click on a portfolio category or tag – I think I cannot change the layout of these pages and the default layout is checkers one column.
e.g.: Try to change the layout of your demo here: http://themes.creiden.com/circleflip/builder-demo/circleflip-portfolio-cats/audio/