Three of the geoscape buttons (Build base, Ufopedia, Graphs & Finance) are hidden, and must be moused over to uncover them. (Personally, I don't agree with this. Later, I intend to go over most of the menus and redo them to be more user-friendly, but I don't know when I'll get around to that. I have to read up how to do that on the wiki, too.)