The right sidebar should be able to be hidden or outside of the content. It currently covers up a majority of the images on the right
Assuming you're on a desktop, and you're currently scrolled over an image, put your mouse cursor just to the left of it. It'll hide itself after a half second or so.
Yes but depending on the size of your screen (or if you zoom in the text) it keeps reappearing every time you scroll down the page a little :/