How to generate the font if you want to make changes

If you want to modify the font and generate the .otf yourself, open the .sfd. 
After making the changes, you need to paste the major direction markers 
(either letters or just plain markers). To do that, copy the desired major 
direction markers which are present as standalone glyphs in the source file. 
Then select the glyphs you want to paste them into (you can drag mouse over 
more at once) and select Paste Into from the Edit menu. Note this action cannot 
be undone (make a backup to make sure you always have a clear copy left).
