How to hide: recent coments, archives, categories…

Hello,

does this include the search box?

if so, create a custom.css and hide sidebar

#sidebar{
	display: none;
}

Have fun

Edit: if you don’t want custom.css though it’s recommended, you can just go to your style.css(Appearance > Editor > style.css) and just place it somewhere there, probably at the very top or very bottom, so you can easily erase it if you want the sidebar again.

again, Have fun