User blog comment:BertH/Fluid layout has arrived/@comment-24342918-20140101130616/@comment-5275700-20140102190100

The sidebars have not been removed. If you're using a tablet computer in the vertical orientation, the sidebar with the photos and videos moves to down below the article. The sidebar within the editor should still be available to you. If you're having trouble, please let us know more via Special:Contact and we can offer detailed help and suggestions.