# pdflatex: Handling of fonts when including other pdfs

I was curious about one fact: How will pdflatex deal with fonts embedded in pdfs it includes?

For example: When I include 100 pdf-files (e.g. using `\includegraphics`) will the generated output file contain the embedded fonts a hundred times (one complete set for each file included)?

Or is it smart enough to recognize that it already has the requested fonts and allow therefore file size reduction?

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It is smart enough but sometimes this can lead to problem. See e.g. tex.stackexchange.com/questions/50829/… and other answers about `\pdfinclusioncopyfonts` –  Ulrike Fischer May 15 '13 at 12:07
@UlrikeFischer Could you make that an answer? –  Joseph Wright Aug 16 '13 at 10:24

It is smart enough but sometimes this can lead to problem. See e.g. Ligatures in figures and pdftex and other answers about `\pdfinclusioncopyfonts`