302 Menu Guide > A Custom SettingsX Focus (M/A)Use the control to focus manually, independentof the option selected for focus mode. To refocususing autofocus, press the shutter-releasebutton halfway or press a control to which AF-ONhas been assigned.q Power aperture Use the control to adjust aperture.E ExposurecompensationUse the control to adjust exposurecompensation.9 ISO sensitivity Use the control to adjust ISO sensitivity.None The control has no effect.D Power AperturePower aperture is available only in modes A and M (a 6 icon indicatesthat power aperture cannot be used). The display may flicker whileaperture is adjusted.Option Description