Question: I'm using longtable. But the caption is too short that it splits up my 12 word caption into two lines centered, only 1/3 of the table width.

I would like to show the caption in one line. Any advice?
Below is my code:

```
\documentclass[a4paper,12pt]{article}
\usepackage{longtable} 
\usepackage{pdflscape} 
\usepackage{graphicx}

\begin{document}
\begin{landscape}
\setlength\LTleft{-40pt}           
\setlength\LTright{-40pt}           
\begin{longtable}{@{\extracolsep{\fill}}llllllllll@{}}
\caption{Why My Caption is Squeezed Here Can I Make The Length Longer?}\\
\hline\hline
Short Name & Full Name  & Source                                     \\
\hline
\\
\hline
\end{longtable}
\end{landscape}
\end{document}

```

Answer: 
Add

```
\setlength\LTcapwidth{\linewidth}

```

to your code, right after (or before) setting `\LTleft` and `\LTright`.

Background: As opposite to the regular `\caption` the one from `longtable` is limited to the width `\LTcapwidth`. When using in portrait mode, the default value is quite reasonable, but too short in landscape mode.

Complete example document:

```
\documentclass[a4paper,12pt]{article}
\usepackage{longtable} 
\usepackage{pdflscape} 
\usepackage{graphicx}

\begin{document}
\begin{landscape}
\setlength\LTleft{-40pt}    
\setlength\LTright{-40pt}           
\setlength\LTcapwidth{\linewidth}
\begin{longtable}{@{\extracolsep{\fill}}llllllllll@{}}
\caption{Why My Caption is Squeezed Here Can I Make The Length Longer?}\\
\hline\hline
Short Name & Full Name  & Source                                     \\
\hline
\\
\hline
\end{longtable}
\end{landscape}
\end{document}

```

Shameless self-advertisement: Adding `\usepackage{caption}` would have solved the issue, too, since it ignores `\LTcapwidth` (unless set to a specific value).
Use `\caption` package and add the following line into your preamble:

```
\usepackage{caption}
\captionsetup[table]{labelfont=bf,textfont=normalfont,singlelinecheck=on,justification=raggedright}

```