I notice that in a pdf file compiled from Latex, "fi" such as in "field" cannot be separated as "f" and "i" when copying text out of the pdf file. I wonder why and if this can be changed? Thanks and regards!
[Tex/LaTex] Why can’t “fi” be separated when being copied from a compiled pdf
ligaturespdf
Best Answer
The following is taken "verbatim" from the TeX Book (Chapter 9 TeX's Roman Fonts, p 51):
Of course, TeX writes ligatures for most of its accents as well, as in
\^o
. The best way to think about ligatures is that they represent a single character in a font. As such, MS Word's "Insert Symbol" dialog is probably a good representation of this:Note how some of the symbols occur in a single box, implying that are "joined at the hip" so to speak, representing a single character (or ligature) in the typeset output. Additionally, this is font specific, with different fonts having different (more or less) ligatures.