I am used to use the numeric keypad for navigation (e.g. : KP7 -> Start, KP1 -> End, KP4 -> Left, etc... ). I am also used to use it for selection (e.g. : Shift+KP7 -> Select from cursor position to beginning of line, Shift+KP1 -> Select from cursor position to end of line, etc...)
With the keyboard configuration installed with Ubuntu, though, Shift+KP7 prints the character "7", Shift+KP1 prints "1", etc...
How can I change this so that Shift+KP-key is not mapped to key, but to Shift+KP-key ?