Native Instruments KONTAKT PLAYER Getting Started page 21

Conversely, when you play notes on your MIDI keyboard, you'll notice that they're being mir-
rored on the On-Screen Keyboard; this is an easy way to ensure that KONTAKT correctly
receives MIDI data from the outside.
Finally, provided that your current Multi contains any Instruments, a range of consecutive
keys will be colored blue; this indicates the playable key range of the currently selected (or
topmost) Instrument.
KONTAKT PLAYER Getting Started – 21