1-5k About the Function MenuUse the function keys (1 to 6) to access the menus and commands in the menu baralong the bottom of the display screen. You can tell whether a menu bar item is a menu or acommand by its appearance.k Status BarThe status bar is an area that displays messages and the current status of the calculator. It isalways displayed at the top of the screen.• Icons are used to indicate the information described below.This icon: Indicates this:The current battery level. The icons indicated (from left to right): Level 3,Level 2, Level 1, Dead. See “Low Battery Message” (page 1-38) for moreinformation.Important!If the Level 1 icon ( ) appears, immediately replace the batteries. Fordetails about battery replacement, see the separate “Hardware User’sGuide”.Calculation in progress.! key was pressed and the calculator is standing by for the next keyoperation.a key was pressed and the calculator is standing by for the next keyoperation. The icon indicates the lower-case input mode (eActivityand Program modes only).Alpha Lock (page 1-2) is in effect.!i(CLIP) was pressed and the calculator is standing by for rangespecification (page 1-11).Setup “Input/Output” setting.Setup “Angle” setting.Setup “Display” setting.Setup “Frac Result” setting.Setup “Complex Mode” setting.• For details about the Setup screen, see “Using the Setup Screen” (page 1-32).• For information about other icons and messages that are specific to each application, seethe chapters that cover each application.