[Tex/LaTex] Todo notes cropped (potentially with fullpage package)

fullpagetodonotes

I find that my todo notes are cropped:

cropped \todo note

This seems to be the case no matter where I put the note. I think the problem might be the fullpage package.

\documentclass[a4paper, fleqn, 12pt]{amsart}

\usepackage{fullpage}
\usepackage{amsmath}
\usepackage{mathtools}
\usepackage{amsthm, todonotes, color, amsfonts, hyperref, amssymb, tipa}
\usepackage{graphicx}
\usepackage{hyphenat}
\usepackage{arydshln}

\usepackage{subcaption}

\begin{document}

Lorem ipsum dolor sit amet,\todo{Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.} consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.

 \end{document}

enter image description here

Please help 🙂

The same problem arises with the following code and resolves when fullpage is removed:

 \documentclass[a4paper, fleqn, 12pt]{amsart}
 \usepackage{fullpage}
 \usepackage{todonotes}

 \begin{document}
 Lorem ipsum dolor sit amet,\todo{Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.} consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. 
 \end{document}

Best Answer

The value to change is textwidth, and the manual points out that you need to adjust \marginparwidth, so

\usepackage[textwidth=0.7in]{todonotes}

Equivalently, 

\usepackage{todonotes}
\setlength\marginparwidth{0.7in}

should do the job.

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