Sometimes I open a new window in a program (such as a new notebook in Mathematica), and the title bar of the window appears above the screen, so I cannot drag the window around.
What can I do when this happens? Is there a command I can use in the terminal to maximize the window, or to change its location?
Hold down "Alt", left click and hold in the window, and then move the mouse around. That should grab the window and let you move it.
In Gnome 3, the default is to use the
Super
akaWindow
key with mouse drag. In many previous Ubuntu window managers, it was theAlt
key with mouse drag. There are a variety of ways to change this keybinding. See How to enable dragging windows with alt-click in gnome 3 / gnome shell - Super User