Innova 3568 Owner's Manual page 6

General Information
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6. Advance Increment Switch — Increments through degrees of advance.
7. Advance Decrement Switch — Decrements through degrees of advance.
8. Zeroing Switch — Returns LCD advance display to 0 (zero) degrees.
9. Flash Switch — Push to turn strobe light on. Push again to turn strobe light off.
10. Ignition Mode Indicator and Symbol
11. RPM Display — Shows current engine speed in revolutions-per-minute.
12. Advance Indicator and Symbol
13. Advance Display — Shows engine timing advance in degrees.
14. Flash Symbol — Blinks when strobe light is operating.
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Fig. 1 Timing Light Controls - General
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