If you're coming from the original EOS 5D the Mark II's menus will look quite different, gone is the single long scrolling page of options, now replaced with the new Canon standard multi-tabbed / page layout. The menus look very similar (in fact almost exactly the same) to the EOS 50D with higher resolution fonts (thanks to the new high resolution screen), more stylized icons and a rather pretty fade effect when you change tab / options. You navigate pages using the multi-selector or main dial and use the quick control dial or multi-selector to move up and down options, press SET (or the multi-selector) to change. Colors (red for shooting, blue for play etc.) are used to distinguish the different categories of options.
The Picture Styles are a range of pre-programmed image parameter sets intended to deliver the best results in different situations. Each Picture Style has its own preset mapping for tone and color response as well as providing the ability to tune sharpness, contrast, saturation and color tone for each. For instance the default sharpening for the Standard Picture Style is level 3, if you prefer less strong you can just adjust it downwards. Sharpness has 8 levels, contrast, saturation and color tone all have have 9 levels.