Changing the scale from Chromatic will hide notes in the note grid and all keys on the keyboard change to white, i.e. no black keys are shown. Notes are hidden but not removed from the pattern which may result in notes not being visible. If a percussion preset or engine is selected for the current MIDI channel then an appropriate drum map is also available in the list of scales and selected by default. The name of the percussion instrument is shown on each key, e.g. Snare Drum.