Page Layout ⇒ Place environment at the bottom in a Beamer

[mgmillani]

I'm trying to place a block inside a frame in such a way that it remains exactly on the same position, regardless of what comes before, so that when I change slides, it doesn't move around. I also want it to be at the bottom. I tried using a \vfill before, but this doesn't work at all. Attempting to use a figure with [b!] also doesn't.

Example code:

Code: Select all

\documentclass{beamer}
\usepackage[utf8]{inputenc}

\begin{document}

	\begin{frame}
		\begin{itemize}
			\item something
		\end{itemize}
		\vfill
		\begin{block}
			Remember
		\end{block}
	\end{frame}
	
		\begin{frame}
		\begin{itemize}
			\item something
			\item another thing
			\item yet another thing
		\end{itemize}
		\vfill
		\begin{block}
			Remember
		\end{block}
	\end{frame}

\end{document}

Is there anything I can do, besides using \vspace with a manually calculated value every frame?

[Johannes_B]

You can use the b option for the frames, so
everything will be aligned at the bottom. Or you put everything
at a fixed position on the page using a package like
textpos.

For your example i would rather use overlays, which are provided
by beamer itself. There are much more options to tweak the
appearance. A look inside the beamer documentation might give
some helpful knowledge.

Code: Select all

\documentclass{beamer}
\usepackage[utf8]{inputenc}
\usetheme{Rochester}%JB: Just to better see the block
\begin{document}

\begin{frame}[b]
	\begin{itemize}
		\item something
	\end{itemize}
	\begin{block}{}
	%JB: blocks need a title, which can be empty
		Remember
	\end{block}
\end{frame}

\begin{frame}[b]
	\begin{itemize}
		\item something
		\item another thing
		\item yet another thing
	\end{itemize}
	\begin{block}{}%JB: blocks need a title
		Remember
	\end{block}
\end{frame}

\begin{frame}{using overlays}
	\begin{itemize}[<+->]
		\item something
		\item another thing
		\item yet another thing
	\end{itemize}
	\begin{block}{}%JB: blocks need a title
		Remember
	\end{block}
\end{frame}
\end{document}

[mgmillani]

Using \begin{frame}[b] looks really ugly, so I decided to use textpos.
My current solution is:

Code: Select all

\documentclass{beamer}
\usepackage[utf8]{inputenc}
\usepackage[absolute, overlay]{textpos}

\setlength{\TPHorizModule}{\paperwidth}\setlength{\TPVertModule}{\paperheight}
\begin{document}

	\newcommand{\remember}
	{%
		\begin{textblock}{1.0}(0.1 , 0.7)
			\begin{block}{Remember}
				Whatever
			\end{block}
		\end{textblock}
	}

	\begin{frame}{}
		\remember
	\end{frame}

	\begin{frame}
		\begin{enumerate}
			\item one
		\end{enumerate}
		\remember
	\end{frame}
	
		\begin{frame}
		\begin{itemize}
			\item something
			\item another thing
			\item yet another thing
		\end{itemize}
		\remember
	\end{frame}

\end{document}

Unfortunately, this requires manually adjusting the position so that the block won't go over the margins. I tried to see if there is any way to get the size of the margins in a Beamer, but I had no success. On beamer.sty, there are lines like \newdimen\beamer@leftmargin, but \beamer@leftmargin cannot be used inside documents. The geometry package may have something for that, but I guess it will be a lot of trouble doing this nicely. If I figure out how to do arithmetics with the lengths, maybe I can fix this.

[Johannes_B]

If you do not want to use overlays, an alternative to textpos might be Tikz (see section 17.13.2 Referencing the current page node). You can do lots of cool stuff with Tikz, have a look at TeXample.net.