Are you talking specifically about comments in the bibliography? If so are you using BibTeX (with \bibliographystyle as the title suggests) or biblatex (with \usepackage{biblatex} as the tags) suggests. Can you give more details what you are thinking about?
– moeweMay 15 '20 at 13:38
@moewe I mean that to had a command example \foc{I believe you could add precision metrics here}. This a comment from me during I read the text and I would like to add a comment with a color to see the author of the content.
– focMay 15 '20 at 13:42
But are you talking about the bibliography and BibTeX/biblatex or just about normal text in your document?
– moeweMay 15 '20 at 13:43
\bibliographystyleas the title suggests) orbiblatex(with\usepackage{biblatex}as the tags) suggests. Can you give more details what you are thinking about? – moewe May 15 '20 at 13:38biblatexor just about normal text in your document? – moewe May 15 '20 at 13:43biblatextag. – moewe May 15 '20 at 13:50todonotespackage. See for example https://tex.stackexchange.com/q/9796/35864 – moewe May 15 '20 at 13:50