\begin{mathpagenote}{clickable}
This note is visible when clicked.
\end{mathpagenote}
\begin{folded}
This note is visible when clicked.
\end{folded}
\begin{mathpagenote}{hoverable}
This note is visible when hovered.
\end{mathpagenote}
\begin{covered}
This note is visible when hovered.
\end{covered}
\begin{mathpagenote}{restricted}
This note is visible only to the instructor.
\end{mathpagenote}
\begin{note}
This note is visible only to the instructor.
\end{note}
\begin{mathpagenote}{restricted, clickable}
This note is visible only to the instructor when clicked.
\end{mathpagenote}
\begin{closed}
This note is visible only to the instructor when clicked.
\end{closed}