Is there a smart way to add a number of dots in a place for a signature in a document? For instance:
................
Supervisor
It would be also perfect to control number of dots as a function of the length of what is under the dots.
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Here is one of my answers, http://tex.stackexchange.com/questions/332357/customizing-the-length-of-dotfill/332358#332358, which itself was already marked a duplicate of http://tex.stackexchange.com/questions/332357/customizing-the-length-of-dotfill/332358#332358 – Steven B. Segletes Mar 20 '17 at 13:48
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Since you have some responses below that seem to answer your question, please consider marking one of them as ‘Accepted’ by clicking on the tickmark below their vote count (see How do you accept an answer?). This shows which answer helped you most, and it assigns reputation points to the author of the answer (and to you!). It's part of this site's idea to identify good questions and answers through upvotes and acceptance of answers. – samcarter_is_at_topanswers.xyz Jul 13 '17 at 18:48
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In order to control the dots width as a function of the text below it, use the \widthof command from calc package. It will exactly calculate the text width, so you may add a little space as ~ if you wish.
\documentclass{article}
\usepackage{calc}
\newcommand{\sigline}[1]{\makebox[\widthof{#1~}]{.\dotfill}\\#1}
\begin{document}
\noindent%
\sigline{Supervisor}
\bigskip
\noindent%
\sigline{Another Long Name for Supervisor}
\end{document}
AboAmmar
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