In the university I'm currently attending a lecture where no lecture notes exist.
I want to tex what the professor has written on the blackboard. I'm gonna include comments (things that my professor said, but didn't write down) that I've written down.
For me it's necessary to distinguish between what the professor wrote down and what I added.
I was thinking about something like this:
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\begin{mycomment}
X is important, because of Y. Catchwords: A, B, C
\end{mycomment}
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The words wrapped inside the mycomment tag should be rendered as normal text, but with a different style, color (grey forinstance) whatever. (I know there are packages for changing the color, like xcolor).
It should be possible to 'toggle' these comments off. I'd like to give the *.tex files to a friend who should decide for himself whether the pdf output should contain my comments or not.
The desired solution would be change a line like
\newcommand{\PrintMyComments}{1}
to
\newcommand{\PrintMyComments}{0}
How can I do this in tex?