Yamaha PSR-S710 Reference Manual page 77

4
Press the [I] (SAVE) button to call up the display for saving your original effect.
5
Use the [3 ▲▼]–[6 ▲▼] buttons to select the destination for saving the effect.
The maximum number for effects that can be saved differs depending on the effect block.
6
Press the [I] (SAVE) button to save the effect.
When recalling the saved effect, use the same procedure as in steps 4–5 of "Selecting an Effect Type."
5
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