Barbara the wiki article I found for non-breaking space http://en.wikipedia.org/wiki/Non-breaking_space states it only works in applications that support it's use. Back in the late 1970s, early 1980s this was better known as a hard space and was available in Word Star and most other word processors of that time. TeX, LaTeX, SGML, and HTML are plain text that also recognize the hard space.

Frances the number of ligatures depends on how many of the extra characters you want the font to support. Do we need † or ‡ for example. Is there a need for ¶ or § and how often to we use ¦ in our work? Are there many people that use « and » ¨in their designs?

As to why the extra characters in some OpenType fonts are not accessable in Xara Designer Pro it is a relatively new feature available in OpenType font creation and is not available in many applications. The programming required to create the feature within the font is not widely understood by font designers. In the reference book for font design I have the author states he does not understand the programming and usually copies the code from font to font. I am searching for more information about the OpenType features.

This link is supposed to be a simplified way of creating OpenType fonts: http://www.bergsland.org/2011/11/typ...ts-simplified/