The menu looks like this :
Note that on slower systems a window outline may be used in stead of the whole window to speed up the movement rate.
Resize
The pointer changes to a cross with arrows, and a window outline will appear.
Drag the mouse pointer past one of the window borders, and the outline will be
resized, as long as the mouse button is being pressed.
Release the mouse button to finish the action.
Note that in order to shrink a window, you first have to move past the border, and then move back to move the border outline inward.
Zoom
This resizes the window to fill the whole screen.
This has the advantage that you can quickly get the window to maximum size,
and if you re-select the zoom function, the window will return to
its original size.
Front
This raises the window, putting it on top of all other windows.
Back
This lowers a window, putting it underneath all other windows.
Identify
This menu item brings up a small window with the name and geometry of the
window. This window disappears once you click any mouse button anywhere
on the screen.
Refresh
This asks the application to redraw the whole window. Not all applications
understand this though.
Close
This is the proper way to politely ask the application to close the window.
In some cases, this means the application ends, in other cases it just removes
this one window (some applications open more than one window).
Some applications will first save their data, or offer you a choise to do so.
In any case, the exact behaviour depends on the application (unfortunately, some applications do not respond to a close request; those need to be killed with the next menu choice).
Kill
This is the hard way to remove a window. The window manager will just send
them a "kill" signal, and the application will not have the time to save
your data, and all other windows belonging to this application will also
disappear, so use this in extreme emergencies only !!