Display screen: a central lcd screen used for navigating patches, menus, and editing effect parameters.primary controls: three control knobs labeled 1, 2, and 3 sit to the right of the screen for adjusting settings on the fly. to the left are easy select and easy edit buttons.effect row buttons: a dedicated horizontal strip of back-lit buttons directly underneath the screen allows quick toggling of specific effect blocks: fx1/comp, od/ds (overdrive/distortion), preamp, fx2/mod, delay, reverb, memory edit, exit, enter, and menu.