Help lines with axes \draw[help lines,xstep=.1,ystep=.1] (0,0) grid (1,1);% \foreach \x in {0,1,…,9} { \node [anchor=north] at (\x/10,0) {0.\x}; }% \foreach \y in {0,1,…,9} { \node [anchor=east] at (0,\y/10) {0.\y}; }
A TikZ example: \documentclass{beamer} \usepackage{tikz} \begin{document} \begin{frame} \begin{center} \begin{tikzpicture} \node (img1) {\includegraphics[height=3cm]{img1}}; \pause \node (img2) at (img1.south east) {\includegraphics[height=3cm]{img2}}; \pause \node (img3) at (img2.south west) [yshift=1cm] {\includegraphics[height=3cm]{img3}}; \end{tikzpicture} \end{center} \end{frame} \end{document} http://tex.stackexchange.com/questions/34921/how-to-overlap-images-in-a-beamer-slide
To define colors in tikz, \draw[color={rgb:red,4;green,2;yellow,1},ultra thick, rounded corners] (0.12,0.00); or \draw[black!40!green,ultra thick, rounded corners] (0.12,0.00) rectangle (0.28,1.00); http://tex.stackexchange.com/questions/24434/how-to-specify-a-fill-color-in-rgb-format-in-a-node-in-tikzpicture
To make foot frame numbers bigger: “You can set the page number in head/foot font; a little example using size=\large: \documentclass{beamer} \usepackage{xcolor} \usetheme{Goettingen} \useinnertheme{circles} \beamertemplatenavigationsymbolsempty \setbeamerfont{page number in head/foot}{size=\large} \setbeamertemplate{footline}[frame number] \begin{document} \frame{ \frametitle{test} test } \end{document} That’s it” (http://tex.stackexchange.com/questions/74241/frame-number-in-beamer)