How to add peak name at particular retention time in pdf form of GC spectra?

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Nitesh Sule

Do you mean, how to add text labels on a spectra that is in the pdf format?

If you open the pdf file in Adobe Reader, you can use "comment" to open the annotation menu. This will let you type any text, format it, highlight etc. Almost any modern pdf file reader will have this option.

Ruchi Singh

thanx a lot nitesh.