154 Menu GuideSelecting Enable release allows the shutter to be released whenno memory card is inserted, although no pictures will berecorded (they will however be displayed in the monitor indemo mode). If Release locked is selected, the shutter-releasebutton is only enabled when a memory card is inserted in thecamera.A The MB-D17 Multi-Power Battery PackThe display for the MB-D17 is shown at right.In the case of EN-EL18a/EN-EL18 batteries,the display shows whether calibration isrequired. If AA batteries are used, thebattery level will be shown by a battery levelicon; other items will not be displayed.Slot Empty Release LockG button ➜ B setup menu