Cursor control:
The cursor key is used to activate the cursor in the comm and GPS windows, and is used to highlight fields for data entry, changing display data or cycling through available options. Pressing once activates the cursor in the comm window, and is indicated by a highlighted area around the standby frequency. Pressing again moves the cursor to the GPS window and is indicated by a highlighted data field. Pressing a third time turns the cursor off.

Data Entry:
The outer knob is used to advance through pages, select comm frequency (MHz), advance the cursor or move through data fields.
The inner knob is used to change data, select comm frequency (kHz) or scroll through additional information that cannot fit on the screen.
The clear key is used to erase information or cancel an entry
The enter key approves operations and confirms data entry and prompts

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