Sometimes when you purchase an alphabet design set, the digitizer has named the letters in such a way so that they show up alphabetically as aAbBcC etc. This does not match any of the short cut buttons.
However, you can choose to import the letters in TWO groups - all the small then all the capital rather easily by changing the size of the import window so that the letters show up in two columns. Now you can use the Shift+mouse to select the first column and choose import. Now choose Add Designs and select the second column and choose import.
Now you can use the a-z and A-Z shortcut buttons to map the letters.
However, you can choose to import the letters in TWO groups - all the small then all the capital rather easily by changing the size of the import window so that the letters show up in two columns. Now you can use the Shift+mouse to select the first column and choose import. Now choose Add Designs and select the second column and choose import.
Now you can use the a-z and A-Z shortcut buttons to map the letters.