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Ok, with this code I get a square

\documentclass[12pt,a4paper]{article}
\usepackage{tikz}

\begin{document}

\begin{tikzpicture}
\draw (0,0) -- (4,0) -- (4,4) -- (0,4) -- (0,0);
\end{tikzpicture}

\end{document}


With this code I get a blank page
\documentclass[12pt,a4paper]{article ...

Hi, I'm trying to add some figures to my text which is written in Hebrew. When I'm using one of the graphics packages, like [tikz] and [graphicx], to add figures, all the figures appear on the text just fine. But adding the [hebrew]{babel} package replaces all of the figures in the text with blank ...

Thanks I will try it

Hi, I'm new to LyX and I have an irritating bug which prevents me to compile documents in Hebrew. When I insert English letters I can compile the document to a P.D.F file. But when I'm using Hebrew letters, for example, typing the Hebrew letter 'alef', I get the following error:
"Undefined control ...