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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.

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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.

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  • Unfortunately, the hack doesn't work. Tried all sort of combinations. +1 for explaining why it would be difficult.
    – alfC
    Commented Jan 20, 2016 at 1:17
  • Hmm: I was fairly confident that would work – boo. I presume the rush is over for you, now, but I'll look at this again. I have a \TPoptions macro implemented in a version 1.8b1 which might be relevant here, and this should prompt me to release that, if only to add a note about how to achieve this sort of thing. Thanks for letting me know.
    – Norman Gray
    Commented Jan 20, 2016 at 11:23
  • I've tried using \TPoptions to overlay just one textbox on the same page as another that is underneath the main text, and haven't got it to work. Am I missing something?
    – hertzsprung
    Commented Oct 27, 2016 at 12:34
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    @hertzsprung The \TPoptions macro allows you to change the in-play options on a per-page basis, but it can't change the effect of those options. On a particular page, the {textblock} material will appear either all before or all after the non-{textblock} material. So no, there's no current way to overlay just one textblock. Doing so would not be impossible, I don't think, but I suspect it would require major surgery to the package.
    – Norman Gray
    Commented Oct 28, 2016 at 12:55

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