Example 3,  Tutorial, play letters X Y Z at random (1)

Select Main Menu\Input and output\Select input device (or shift + F4)

Check that Random characters is selected.

Select Main Menu\Play\Character Filter (or Ctrl+F9)

Click on the Clear all button

Click on X, Y, Z in the custom filter display

Make sure that “Use custom filter” is checked

Select Main Menu\Play\Play morse code (F9)

Click on the Play button