Patent ID: 7334192

Claim:
A system for enabling selection of a selectable graphic image on a display screen adapted to be mounted in an instrument, comprising: a display screen, including a column with a plurality of selectable graphic images therein, wherein each graphic image is adapted to be selectable and the column is adapted to be moveable for enabling a line graphic image to be formed thereby and to be displayed on the display screen; a manipulation enabling element for enabling manipulation of the column of the plurality of graphic images on the display screen to enable movement of a graphic image into position as a selectable graphic image on the display screen and to enable selection of the selectable graphic image to be a part of the line graphic image to be formed on the display screen, wherein the manipulation enabling element appears to be a rotatable wheel which occupies a three-dimensional space, and the column of the plurality of graphic images is foreshortened at a top and bottom of the rotatable wheel and appears to rotate with the rotatable wheel; and a selection and entry enabling element for enabling selection and entry of the selectable graphic image in the display screen, adapted to be rotatable for selection and pressable for entry, such that rotation and pressing thereof enables selection and entry of the selectable graphic image.