Furuno COLOR VIDEO PLOTTER 1833C - Selecting Screen Split Method in Combination Displays

4. VIDEO SOUNDER OPERATION
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4.2.3 Selecting screen split method in combination displays
On combination sounder displays you can split the screen vertically or
horizontally, using the SPLIT soft key as below.
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SPLIT
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SPLIT
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How to use the SPLIT soft key (example: dual frequency display)