Alright, here's a weird one. I'm writing a paper for my English class and am encountering some problems.** So, I put \usepackage[T1]{fontenc} in my preamble and compile it.** It works!

Not so fast. I need to proofread my draft. Although I could use Foxit on my PC, I want to edit on the go, so I grab my Android tablet. I've used the annotations and highlighting on it before with other papers and it works well. So I get the file on my tablet, open it, and... I can't do anything with text. I can add comments and drawings, but anything that selects text does not work.

I compare my paper's .tex source to the template I usually use and the only thing that's different about the preamble is the use of \usepackage[T1]{fontenc]. I remove the package, recompile, and lo and behold I can now select, highlight, underline, and strikethrough text on my Android using Adobe Reader, the same application as before.

What happened? And what is making Adobe Reader get confused over \usepackage[T1]{fontenc}?

\documentclass[12pt,letterpaper]{article}
\usepackage[T1]{fontenc}
\begin{document}
Here is some text. Can you highlight it? My post says you can't. Do {\it you} have
what it takes to figure out what's going wrong!?
\end{document}


And here is a PDF compiled without the line in question (click here)

The first PDF is unselectable, and the second is.

Edit 1: I realized I messed up and it wasn't textcomp causing the problem but [T1]{fontenc}. I reworded the title and question to reflect this. I'd still like to know what's up, but I can simply remove that and my paper works. It was in there because I wanted better language support, but I didn't end up using it.

• You are probably using bitmap fonts. Install the cm-super fonts (large package!) or use \usepackage{lmodern}. – Ulrike Fischer May 27 '13 at 7:33
You are probably using bitmap fonts. Install the cm-super fonts (large package!) or use \usepackage{lmodern}.