I'm editing a
woff font file using FontForge, and I would like to add a glyph for the unicode character 0xD835.
However the box for this character has 2 crosses, one for the glyph and one for the unicode char (while usually there is only 1 cross for the glyph), moreover its description in the top bar is "surrogate high, non private use" (what does this mean?), see images below
I tried copying a glyph from another character and pasting it into the 0xD835 box, obtaining this
but the character is not displaying when I use it.
Moreover, if I click on "glyph info" then FontForge crashes.
Is it possibile to solve the problem?