fbox 在 sublime 文本编辑器中使用 sumatra pdf 时会显示很粗的线条，但在 texmaker 中使用 sumatra 时会显示正常的细线条——这是为什么？
\begin{tikzpicture}
[remember picture, overlay] \draw[line width=1pt] ($(current page.north west)+(1in, -.5in) $)rectangle($(current page.south east)+(-.5in, 1in) $);
\end{tikzpicture}
\fbox{However long the sentence is, it will not break into separate lines.}
\framebox{same as \texttt{\textbackslash fbox}, but more controls}
\centering
\fbox{
\begin{minipage}{.7\linewidth}
Put non-floating objects inside the \texttt{\textbackslash fbox}, e.g., minipages, tabulars, etc.
\end{minipage}
}
\centering
\fbox{
\begin{tabular}{c|cc}
$+$ & 0 & 1 \\
\hline
0 & 0 & 1 \\
1 & 1 & 0
\end{tabular} \hspace{.5cm}
\begin{tabular}{c|cc}
$\cdot$ & 0 & 1 \\
\hline
0 & 0 & 0 \\
1 & 0 & 1
\end{tabular}
}