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This may be pretty obvious but I am not sure...
Are some glyphs rendered useless in Open type?
For instance, the standard 'macintosh roman' glyph set has 'macron' or '00AF' in unicode.
This glyph would be combined with another glyph (perhaps a 'U') to create a combined letter in the pre-Unicode world.
However, in Unicode you can actually incude all the glyphs as fully formed or complete single glyphs.
So does this mean that 'macron' is not needed anymore - at least in an Open type font that includes all the instances of macron use you want to support?
Or are there any arguements for keeping 'macron'?
Do you for instance, need it on some keyboards and/or OSs to invoke the new complete Unicode glyph?
For bonus points, how do you safely add glyphs from additional code areas in fontlab? Having re-read the documentation I am still feeling oddly sqeamish.