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Have you tried this code:

\documentclass[twocolumn]{article}
\usepackage{multicol}
\usepackage{graphicx}
\usepackage{graphics}


\begin{document}

aa
\begin{figure}
% \centering
\includegraphics[width=2.5cm] {cc.jpg}
\caption{s}
\label{fig:cc}
\end{figure}

\end{document}

I do not need the ...

Hi there,

When I put a figure inside tow columns environment, it is not appeared and I get the following warning.
Floats and margins are not allowed inside multlcoulmns environment.

This is the code:

\documentclass{article}
\usepackage{multicol}
\usepackage{graphicx}
\usepackage{a4wide ...

My situation is like:
The father folder contains the following folders

main folder
preface folder
titlepage folder
chapter one folder.


Each folder contains its own .tex file and figures. I use subfiles,
for example in the main file I put

\subfile{../titlepage/titlepage}
\subfile{../preface ...

Thank You.
Sorry, I did not understand you. Yes, I use subfolders.

Hi,

I divided my work into sub-files, each sub-file has chapter. At the title page I put a figure and it works very good, but when I compile the whole file I get an error that your figure is not exist.

Thank You

Thank you very much.

I do not if it is possible or not!

Hi,

"Subfiles" package helps us to separate our file into subfiles (chapter), but I would like to put each chapter with its figures in a separated file, and so the cammand in the main file will be
\subfile{folder name/filename}
But my question is: what things shall we write at the begining of ...

Hi there!


Once upon a time I saw an amazing Mathematical presentation. The previous page is put on the left lower corner, the presented page is at the center and the title and other information are put at the right upper corner.
My question, could some thing like that be done by beamer?

Thanks ...

Yes it does.
Thank you.