[Tex/LaTex] Selective overlay option of textblock with the textpos package

overlaystextpos

The texpos package has an option called [overlay] that, when loading the package makes all the text boxes textblocks be above (obscuring) other elements of the page.

Is there a way to control whether or not a particular textblock overlays or not?

\documentclass{beamer}
\usepackage[overlay]{texpos}
\begin{document}
    \begin{frame}{title}
        Other elements
        \begin{textblock}{6}(5,7.1) %is there an option to NOT overlay this particular one
           Hello % or include a bulky image here.
        \end{textblock}
    \end{frame}
\end{document}

Since this is an emergency (my presentation is tomorrow) 🙂 I will
give one or two 100 point bounties for a solution or a workaround.

Best Answer

You can't do this in general: the [overlay] option works by adjusting the TeX \shipout command so that all of the {textblock} material on a page is output either before (non-overlay) or after (overlay) the non-{textblock} material.

Since this is a presentation, however, you might be able to hack this on a per-page basis. Try setting \makeatletter\TP@overlayfalse before the page you want to hack, and then \TP@overlaytrue after it. That should result in all of the {textblock} environments on the affected page being non-overlay.

You might have to play around with the precise positioning of those commands, but putting them before and after the {frame} environment should work. I haven't tested this – let us know how you get on.

Related Solutions

[Tex/LaTex] Vertically Aligning or Locking Text in Beamer Presentation

You could use overlayarea (see Section 9.5 Dynamically Changing Text or Images of the manual), \onslide, and \only:

\documentclass[11pt,xcolor=pdftex,dvipsnames,table]{beamer}

\usepackage{multirow}
\usepackage{beamerthemesplit}
\usetheme{Berkeley}
\usecolortheme{dolphin}
\usepackage{graphicx}
\usepackage{epsf}
\usepackage{pgfplots}
\pgfplotsset{compat=newest}

\title[Short Title]{Longer Presentation Title}
\author[John Doe]{John Doe}
\institute{University of Nowhere}
\date{July 7, 2011}

\begin{document}

\maketitle

\begin{frame}
  \frametitle{Introduction}
  \framesubtitle{Definitions (Cont...)}
\textit{Definition 5:} If $A$ is an $m \times n$ matrix, $I$ is a subset of $\{1, ..., m\}$ with $k$ elements, and $J$ is a subset of $\{1, ..., n\}$ with $k$ elements, then the matrix for the $k \times k$ minor of $A$ that corresponds to the rows with index in $I$ and the columns with index in $J$, is written as $[A]_{I,J}$.\\[1\baselineskip]


\begin{overlayarea}{\textwidth}{1cm}
\only<1>{If $I = J$, then $[A]_{I,J}$ is called a \textit{principal minor}.}
\only<2>{If the matrix consists of elements in rows and columns from $1$ to $k$, then the principal minor is called a \textit{leading principal minor}.}
\end{overlayarea}

\begin{overlayarea}{\textwidth}{3cm}
\only<1>{%
\[A =
      \left(
        \begin{array}{rrr}
          \multicolumn{1}{r}{1} & \multicolumn{1}{r}{4} & \multicolumn{1}{r}{7} \\
          \cline{2-3}
          \multicolumn{1}{r}{3} & \multicolumn{1}{|r}{0} & \multicolumn{1}{r|}{5} \\
          \multicolumn{1}{r}{-1} & \multicolumn{1}{|r}{9} & \multicolumn{1}{r|}{11} \\
          \cline{2-3}
        \end{array}
      \right), \mbox{~where~} I = \{2, 3\} \mbox{~and~} J = \{2,3\}
    \]
}
\only<2>{%
    \[A =
      \left(
        \begin{array}{rrr}
          \cline{1-2}
          \multicolumn{1}{|r}{1} & \multicolumn{1}{r|}{4} & \multicolumn{1}{r}{7} \\
          \multicolumn{1}{|r}{3} & \multicolumn{1}{r|}{0} & \multicolumn{1}{r}{5} \\
          \cline{1-2}
          \multicolumn{1}{r}{-1} & \multicolumn{1}{r}{9} & \multicolumn{1}{r}{11} \\
        \end{array}
      \right), \mbox{~where~} I = \{1,2\} \mbox{~and~} J = \{1,2\}
    \]
}
\end{overlayarea}
\end{frame}

\end{document}

[Tex/LaTex] Setting \textwidth seems to break textblock* command from textpos package

You have to use \setlength instead of \renewcommand and also \dimexpr\paperheight-1cm\relax for the second question :

\documentclass{article}
\usepackage[absolute]{textpos}
\setlength{\textwidth}{17cm} % (*)
\begin{document}
  \begin{textblock*}{3cm}(1cm,\dimexpr\paperheight-1cm\relax)
    XXXXXXXXXXXXXXX
  \end{textblock*}
\end{document}

enter image description here

Best Answer

Related Solutions

[Tex/LaTex] Vertically Aligning or Locking Text in Beamer Presentation

[Tex/LaTex] Setting \textwidth seems to break textblock* command from textpos package

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