# Lower hrulefill inside tabu

I'm trying to make a paper form. I want to draw a horizontal line for people to write on. I want that line below the baseline. I found a TUGboat on making forms that defines an \xfill command that works fine in a paragraph, but I can't get it to work in a tabu environment. How can I use position something equivalent to \hrulefill below the baseline in a tabu environment?

MWE:

\documentclass{article}

% From https://www.tug.org/tugboat/tb24-2/tb77wilson.pdf
\newcommand*{\xfill}[1][0pt]{%
\hbox to 1pt{\hss
\raisebox{#1}{\rule{1.2pt}{0.4pt}}%
\hss}\hfill}

\usepackage{tabu}

\begin{document}

This works: \xfill[-0.5ex]

\begin{tabu}{@{}X@{}}
Rule is too high: \hrulefill \\
Rule is not visible: \xfill[-0.5ex] \\
\end{tabu}

\end{document}


Rendered:

I'm using MacTeX 2014, rendering with LuaLaTeX.

You could use the xhfill package which gives commands that extend \hrulefill allowing you to control the attributes (color, thickness, height/depth):

\documentclass{article}
\usepackage{xhfill}

% From https://www.tug.org/tugboat/tb24-2/tb77wilson.pdf
\newcommand*{\xfill}[1][0pt]{%
\hbox to 1pt{\hss
\raisebox{#1}{\rule{1.2pt}{0.4pt}}%
\hss}\hfill}

\usepackage{tabu}

\begin{document}

This works: \xfill[-0.5ex]

\begin{tabu}{@{}X@{}}
Rule is too high: \hrulefill \\
Rule is visible: \xrfill[-0.5ex]{0.4pt} \\
\end{tabu}

\end{document}


• I'd like to point out that if you want to use \xrfill in a table cell by itself, you seem to need to \leavevmode first (e.g. \leavevmode\xrfill{0.4pt}). Without \leavevmode you get "Leaders not followed by proper glue." – dsedivec Aug 6 '14 at 5:17