Some selections, like the Scene mode, will bring up additional menus or options that must be considered before they return you to a shooting mode. The Function mode is the tenth icon in the Recording menu. Once you highlight the function you want to change, press the Shutter button again, and it will bring up the menu for that function. In Exposure mode, those options include Program AE, Aperture Priority, Shutter Speed Priority, and Manual. Each option provides various levels of user control over shutter speed and aperture.
Manual exposure places the user in complete control of both shutter speed and aperture settings.
Though it's a long process, the Casio's extensive on-screen Function menu seems to be the simplest answer to accessing the many features this camera has to offer. In some cases, you can bypass the Function menu and make some simple mode changes using the buttons on the camera. Their icons will appear at the bottom of the LCD to help you determine what function each button controls. You scroll through their menu options by continuing to press the button until you reach the options you want. Exposure mode options are the same as those listed above for the Function menu.