Custom Sidebar, Content Area

Hi, This is a very nice theme, many thanks to the author

I would like to know if its possible to have just one sidebar without top and bottom sidebar in order to increase the width of the content area or any other form to increase the content area with a sidebar. if yes, how can i do it? i am using iframe to inset url to the site so i need small sidebar and bigger content area! thanks

here is the link: https://beauty.hostingcrown.com/test-frame/