[Tex/LaTex] cropping problem with includegraphics and trim in beamer

beamer

I am including figures from a paper I'm writing into the associated presentation slides written in beamer. Both the paper and the slides are pdf and I'm typesetting using pdflatex. I'm using \includegraphics[page=1, trim=1 2 3 4,clip=true]{paper.pdf} to include chunks of the paper.pdf into the beamer presentation. However, I've found that the trim command seems to include the entire page, but renders everything outside the trim'd area transparent. If I drag my mouse cursor over the areas outside the included figure in the presentation slides, I can still see and select the text surrounding the figure which has also been inserted into my slides (it's just invisible).

This has the side effect of making the size of slides.pdf very large because all this extraneous information around the figure is dragged along, but rendered transparent. Is there anyway to not include or remove this extraneous information from my slides.pdf somehow?

Best Answer

Yes, the whole PDF page is always included. Options trim and viewport only select the box that is seen by TeX and option clip only makes the part outside the box invisible. But option clip does not read the PDF image page contents, analyzes its page stream operators and rewrites the page stream for the only inclusion of the visible elements. This is not a trivial task at all. I do not know a freeware tool that is able to do this automatically except for rendering to a bitmap.

Without converting to a bitmap (and loss of quality) it is not easy to remove the invisible parts.

Commercial tools?
Manually in vector programs that are able to deal with PDF, e.g. inkscape.

With good knowledges of PDF (or PostScript) the removal can also be manually done by editing the PDF or PostScript files directly. But it depends on the familiarity with the formats, the complexity of the PDF file and the elements that should be removed.

The box could cut through characters. It is possible to select the dot of an i. But if you want to remove the stem, you would have to go to the glyph description of the character in the embedded font.

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[Tex/LaTex] Tikz figure in Beamer shifting way to the right of the frame

This is most likely just caused by added spaces. You need to add a % if a line ends with { and sometimes also with } to avoid that the line break is taken as a space. Note that \tikzstyle is deprecated and also requires a % after the ] if it is used outside a tikzpicture.

The following doesn't produce any shifting:

\begin{figure}
  \resizebox{\linewidth}{!}{%
\begin{tikzpicture}[scheme/.style={draw = black, fill = black!10, thin, rectangle, minimum width = 15pt, minimum height = 10pt}]
  \node (n1) [scheme] {};
  \node (n2) [scheme, at = (n1.east), right = 12pt] {};
  \node (n3) [scheme, at = (n2.east), right = 12pt] {};
  \node (n4) [scheme, at = (n3.east), right = 12pt] {};
\end{tikzpicture}%
}%
  \caption{Test}
\end{figure}

There might be some leading and trailing spaces in the input file as well. Try to add \ignorespaces before and \unskip afterwards.

A further cause might be a paragraph indent which can be removed by placing \noindent before the content. You can also use \begin{adjustbox}{width=\linewidth} .. \end{adjustbox} from the adjustbox package for the scaling. It is more efficient than \resizebox and also allows special content like verbatim. It adds the \noindent by itself to play it save.

[Tex/LaTex] Beamer: \AtBeginSection doesn’t agree with ignorenonframetext

If you move \AtBeginSection declaration to the preamble, it will work even with ignorenonframetext option.

I've could not find any explicit reference in beameruserguide about where to place \AtBeginSection commands. But on section 3 "Tutorial: Euclid's Presentation" a conference presentation example (conference-ornate-20min.en.tex) is detailed. In it, \AtBeginSection command is placed before \begin{document} so I always used this way without any problem.

Best Answer

Related Solutions

[Tex/LaTex] Tikz figure in Beamer shifting way to the right of the frame

[Tex/LaTex] Beamer: \AtBeginSection doesn’t agree with ignorenonframetext

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