Hi musicalmemoriesuk,
on
Tyros4, press "[FUNCTION] > [C] STYLE SETTING/SPLIT POINT/CHORD FINGERING > TAB [<][>]
STYLE SETTING" and set "STOP ACMP" parameter to "OFF" (as mentioned by vanzee before).
Then press [EXIT] button to close the Style Setting display. This will automatically save your changes to the System Setup.
Note: The setting of "Stop ACMP" is also automatically saved in
Registrations (if the "Style" check box is ticked when memorizing a Registration). Therefore, "Stop ACMP" can possibly be changed unexpectedly by Registrations.
Best regards,
Chris