This article is based on a message written by Simon Williams
The Yamaha psr740 has a feature on its registration memories called "FREEZE". This function prevents the style that is playing to change to a new one held in the registration memory.

When you hold the memory button and press a registration button (1-4), you store the voice settings, transpose value, volume settings, style and tempo amongst other values into this "memory".

Without the freeze button on, if you press any one of the registration memory buttons, it calls up the memorised voices, style and other settings.

If your playing a song with another style and do this, the style will suddenly change to the memorised one which can be quite annoying sometimes.

  The freeze button allows only the instruments (voices) to change according to the registration memory setting, the current style is retained.

On old keyboards there was a feature called "HOLD MEMORY" which would hold the left hand accompaniment chord if you released your fingers from the keyboard.

Nowadays all keyboard do this automatically, the chord continues playing in the style until you change to a different one, even if you remove your fingers from the left section of the keyboard.

On the 740 you have a feature called "SYNC STOP", which stops the style and chord accompaniment immediately when you release your left hand.