Yamaha Electone EL-87 Owner's Manual page 21

Data Control Buttons
The Data Control buttons are used to select 1 a voice/rhythm
or function shown on the display.
Press the STRINGS button in the Upper Keyboard Voice 1
section once again.
This LCD changes to show some of the other ways in which
the Data Control buttons are used to control Electone functions.
Each pair of buttons corresponding to the section of the display
directly above it increases/decreases 2 the value or chooses 3
a setting/function. When you are setting the Pan position, each
of them moves the curosr 4 to the right/left.
Page Buttons
These buttons are used to select (when available) the various
"pages" of the display, the names of which appear at the top
right of the LCD. Use Page [>] to select the next page, and
Page[<] to select the previous page.
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