I have added a "boxed x" and "CHECK MARK" to my document, but they do
not get exported to pdf output. They are in the .tex file, and do go
through to the HTML. So far I'm using these packages
#+LaTeX_HEADER: \usepackage[T1]{fontenc}
#+LaTeX_HEADER: \usepackage{libertine}
#+LaTeX_HEADER: \usepackage[margin=0.80in]{geometry}
#+LaTeX_HEADER: \usepackage{setspace}
#+LaTeX_HEADER: \usepackage{enumitem}
#+LaTeX_HEADER: \usepackage{endnotes}
(Bonus points for UTF8 code for the opposite of "CHECK MARK"?)
