The first shows the reception tree diagram: you start with your eyes at the START and follow the points (dit) to the left or dashes (dah) to the right, until you reach the transmitted letter.
The second shows the transmission table: the letters and numbers are in alphabetical order, from top to bottom, so that you can easily find them. Then just transmit the indicated points (dit) and dashes (dah).
NOTE: By getting the Pro Version you can transmit Morse code using the flash and the speaker of your smartphone.
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