I'm working on translating the Math FAQs from French and have discovered that both Math and Writer only display a subset of the displayable characters in any given font.
For instance, the double arrow character ⇄ (unicode 21c4) exists in a number of fonts, and can be inserted by typing CTRL+u21c4, yet it doesn't show up in Writer's Insert->Special Character or Math's Catalog->Edit windows.
Does anyone know why there's only a subset? Is it arbitrary, or perhaps chosen to mimic the subset shown in MS Word?
Thanks.
- Glen