Table grid glitches on certain zoom level

Question

When writing tables in LaTeX I sometime notice with various PDF viewer the same glitches that only seem to appear on certain zoom level.

Any explanation?

Another example of these glitches, but this time in the opposite direction:

Here a minimal example (taken from here):

\documentclass{article}
\begin{document}
\begin{table}
    \caption{Table showing Feature 5's Functional Tests}
    \hspace*{-0.5in}
    \begin{tabular}[h!]{|p{0.6cm}|p{4cm}|p{5cm}|p{4cm}|p{1.5cm}|}
    \hline
    {\bf Test ID } & {\bf Task } & {\bf Expected} & {\bf Actual} & {\bf Outcome} \
    \hline
       5.1 & Something &  Something & Something &  Success \
    \hline
       5.2 & Something &  Something & Something &  Success \
    \hline
       5.3 & Something &  Something & Something &  Success \
    \hline
       5.4 & Something &  Something & Something &  Success \
    \hline
    \end{tabular}
    \end{table}
\end{document}

Without knowing the code that gives this result, no one can answer you. Write an MWE: How to make a “minimum example” — AndréC, Aug 10 '20 at 13:22
As I understand it PDF viewers will snap lines to pixel boundaries (e.g. https://tex.stackexchange.com/a/53935), so if you only see this at some zoom levels in some viewers, it's probably just something like that. (I'm no expert though.) — Torbjørn T., Aug 10 '20 at 13:34
I don't know why but a solution is to use \usepackage{array} (https://tex.stackexchange.com/a/63153/85416) — nowox, Aug 10 '20 at 13:43

score 1 · Answer 1 · answered Aug 10 '20 at 13:45

From the array package one can read:

With standard LATEX boxed tabulars actually have strange corners because the horizontal rules end in the middle of the vertical ones. This looks very unpleasant when a large \arrayrulewidth is chosen. In that case a simple table like

\setlength{\arrayrulewidth}{5pt}
\begin{tabular}{|l|}
\hline A \\ \hline
\end{tabular}

So using \usepackage{array} may solve your issue.

Table grid glitches on certain zoom level

1 Answers1