OWON ODP Series - Manual (Page 28)

5.Front Panel Operation
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5.7 Use Built-in Help
(1) Press Help function button , the catalog will display in the screen.
(2) Press the
▲ / ▼ key or turn the knob to
choose help topic.
(3) Press the key to view the details about the topic; press the ← key to go back to
the catalog .
(4) Press Help again to exit the help, or just do other operations.