You can open palette window by pressing 'Left Softkey'. In 8bpp mode palette consists of 256 colors, which you can see in palette window as 256 cells. At the bottom of palette window you can see text 'FC' or 'BC' - it is what color you can selectr now. For FC there is red frame-cursor, for BC - blue. Switch between FC and BC you can by pressing 'Joy-button'.