g7: Hi-Res Zoom Speed
G button U A Custom Settings menu
Choose the zoom speed for Hi-Res Zoom. This option only takes effect when Hi-Res Zoom is assigned to a control using any of the [Fn1 button], [Fn2 button], [Lens Fn ring (clockwise)], and [Lens Fn ring (counterclockwise)] options for Custom Setting g2 [Custom controls].