Yamaha PSR1000 Quick Steps page 14

VIII. Making Global Settings for Voices
If Voice settings such as Effects, EQ and Harmony are changed for a Voice,
these settings normally will reset to something else when a different Voice is
chosen. However settings can be made to affect all Voices globally, by editing
the 'VOICE SET' page.
For this example, all Effects will be turned OFF globally for all Voices:
1) Press the [FUNCTION] button.
2) Press the [E] 'REGIST. SEQUENCE / FREEZE / VOICE SET' button.
3) Use the [BACK] and [NEXT] buttons to display the 'VOICE SET' page in the
screen.
4) Use the [A] '^' and [B] 'v' buttons to select a Voice section ('MAIN', 'LAYER', or
'LEFT').
5) Use the '5' [^] and [v] toggle buttons to delete the checkmark from the box
under the word 'EFFECT'.
6) Press the [EXIT] button twice to return to the 'MAIN' screen.
7) If the [DSP] button on the right side of the front panel is ON (red LED
illuminated), press it once to turn it OFF. All Voices in the selected Voice
section will no longer have Effects applied to them.
Owner's Manual, p. 143