Before revision: Today, mouse keys usually refers to the numeric keypad layout standardized with the introduction of the X Window System in 1984.The X Keyboard Extension: Protocol SpecificationThe X Keyboard Extension: Library Specification Layout X window system MouseKeys default numpad layout key action Num Lock with Alt+Shift enable/disable MouseKeys 8 cursor up 2 cursor down 6 cursor right 4 cursor left 7 cursor up and left 9 cursor up and right 3 cursor down and right 1 cursor down and left / select primary button * select modifier button - select alternate button 5 click selected button + double click selected button 0 depress selected button .
After revision: Today, mouse keys usually refers to the numeric keypad layout standardized with the introduction of the X Window System in 1984.The X Keyboard Extension: Protocol SpecificationThe X Keyboard Extension: Library Specification Layout X window system MouseKeys default numpad layout key action Num Lock with enable/disable MouseKeys 8 cursor up 2 cursor down 6 cursor right 4 cursor left 7 cursor up and left 9 cursor up and right 3 cursor down and right 1 cursor down and left / select primary button * select modifier button - select alternate button 5 click selected button + double click selected button 0 depress selected button .