Kawai MR210 Owner's Manual page 11

Your Kawai digital piano offers not only equal temperament (the modern standard) but also immediate
access to those popular during the Reneissance and Baroque period.
«Procedure
(1) Make sure that the piano is in the programming mode.
(2) Press the JAZZ ORGAN switch so that it flashes to indicate that the
piano is waiting for a temperament specification.
(3) Press one of the seven white keys at the lower end of the keyboard to
select one of these corresponding temperaments.
(D Equal temperament without the tuning curve
(2) Mersenne pure temperament
(3 Pythagorean temperament
Meantone temperament
(5) Werckmeister HI temperament
Kirnberger Ill temperament
(7) Equal temperament with the tuning curve
(4) Leave the programming mode.
eNote: When the power is first applied or reapplied after a short break,
the piano returns to the modern standard (equal temperament
with the tuning curve = #7).
Key set function is also available at this point. As you know, limitless modulation
of the key became available only after the invention of Equal temperament.
When we use a temperament except Equal temperament, we must carefuily
choose the key signature to play in.
To select the key signature setting, simply press one of the key. For example, if
the tune you are going to play is written in D major, press D key to set the keys.
Please note that this will only change the "balance" of the tuning, and the pitch of
the keyboard will remain unchanged. Use the TRANSPOSE control to change
the pitch of the whole keyboard.