[texhax] [pdftex] image XObjects in pdfTeX or XeTeX PDF output?

[Paul Isambert]

 > Also, by "font expansion," do we mean what InDesign calls "glyph 
scaling"?

Yes, except pdfTeX is a little bit subtler.

First, font expansion can be used after the lines have been justified 
(\pdfadjustspacing=1), in which case TeX builds the paragraph without 
expansion and applies it in a cosmetic fashion afterward, so lines look 
better, or it can be used in the justification process 
(\pdfadjustspacing=2).

Second, each character has an \efcode that sets how much it can be 
expanded, in thousandth of the expansion defined for the font it belongs 
to. I'm not sure it makes a difference to the naked eye, though.

Best,
Paul