76 Menu Guide/Custom Settings8: Flash Compensation (P, S, A, and M Modes Only)Adjust flash level ( 48).9: AF-assist (All Modes Except and )If On (the default setting) is selected and the subject is poorly lit,the AF-assist illuminator will light when required to assist the focusoperation ( 23). Choose Off to disable the AF-assist illuminator.Note that when the illuminator is off, the camera may not be ableto focus on poorly-lit subjects using autofocus.10: ISO Auto (P, S, A, and M Modes Only)If Off (the default setting) is selected, ISO sensitivity will remainfixed at the value selected by the user ( 37). If On is selected,ISO sensitivity will automatically be adjusted if optimal exposurecan not be achieved at the selected value (flash level is adjustedappropriately). The maximum value for auto ISO sensitivity can beselected using the Max. sensitivity option. In modes P and A,sensitivity will only be adjusted if underexposure would result at the shutter speed selectedfor Min. shutter speed (slower shutter speeds may be used if optimal exposure can not beachieved at the value selected for maximum sensitivity).When On is selected, the viewfinder and shooting informationdisplay show ISO-AUTO. Unless a flash is used, these indicators blinkwhen sensitivity is altered from the value selected by the user.Note that noise is more likely at higher sensitivities.ISO AutoAuto ISO control is not available at an ISO sensitivity of HI 1. Foreground subjects may beunderexposed in photos taken with the flash at slow shutter speeds, in daylight, or against a brightbackground. Choose a flash mode other than slow sync or select mode A or M and choose a largeraperture.