Depending on your ultimate goal, this may apply: http://tex.stackexchange.com/questions/140529/graphics-equations-put-text-on-equations/140547#140547. And here is a different approach: http://tex.stackexchange.com/questions/140310/multiple-lists-of-to-do-notes/168160#168160
– Steven B. SegletesApr 02 '14 at 15:35
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For whom are the comments intended? A fellow writer with access to the source .tex file or the reader of the final .pdf file?
– Waldir LeoncioApr 02 '14 at 19:05
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Welcome to TeX.SX! On this site, a question should typically revolve around an abstract issue (e.g. "How do I get a double horizontal line in a table?") rather than a concrete application (e.g. "How do I make this table?"). Questions that look like "Please do this complicated thing for me" tend to get closed because they are either "off topic", "too broad", or "unclear". Please try to make your question clear and simple by giving a minimal working example (MWE): you'll stand a greater chance of getting help.
– Martin SchröderApr 03 '14 at 11:08
todonotes. Have you taken a look at that package? Can you provide an minimal working example (MWE) of your own approaches to that? – Ronny Apr 02 '14 at 15:14