Rio is the Plan 9 window system. To read more of this window, the up and down arrows scroll the text up and down half screens. To effectively use rio, you need at least a three button mouse. If you only have a two button mouse you can emulate the middle button by holding down shift key whilst pressing the right button. Button 1, 2, and 3 are used to refer to the left, middle, and right buttons respectively. THE POP-UP MENU Pressing and holding down button 3 on the desktop or shell window will give you a menu with the following options: * New - create a new window * Resize - reshape a window * Move - move a window without reshaping it * Delete - close a window * Hide - hides a window from display (it will appear in this menu) *