17. The touch screen system of claim 11 , wherein the command interpreter is further configured to identify a pinning command, the pinning command disabling the touch screen system from interpreting a finger dragging input on the touch screen graphical display as a scroll command or as a pan command.
11. A touch screen system comprising: a touch screen graphical display; a command interpreter configured to identify modifier interactions with the graphical display and, in response to identification of the modifier interaction, modify the interpretation of other interaction with the graphical display; and one or more persistent data storage devices, the data storage devices storing a first set of rules for interpreting user interaction with the graphical display and a second set of rules for interpreting user interaction with the graphical display, the first set of rules interpreting motion across a map or a proper subset of a collection of information as a scrolling or panning command, the second set of rules interpreting the motion as a glyph, wherein the command interpreter is configured to modify the interpretation of the other interaction by switching between interpretation under the first set of rules and interpretation under the second set of rules in response to determining that a first input over a selectable object on the touch screen graphical display does not match a type of input associated with selection of the selectable object.