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Using the following code, can the red arrow and its text be inserted within a node at pos=.5 (beside the blue circle) of the blue line, instead of drawing it separately with a draw command

    \documentclass{beamer}
\beamertemplatenavigationsymbolsempty
\usepackage{verbatim}
\usepackage{tikz}
\usepackage{pgfplots}
\usetikzlibrary{arrows, arrows.meta, positioning, calc, intersections, decorations.pathreplacing, decorations.pathmorphing, decorations.markings, shapes, shapes.misc, shapes.symbols, shapes.geometric, patterns}
\begin{document}
\begin{frame}[fragile,t]
\frametitle{}
\begin{tikzpicture}[scale=.9, transform shape]
\draw [thick,-latex](0,0) -- (4,0) node [black, xshift=.93cm, yshift=0cm] {$Q$};
\draw [thick,-latex](0,0) -- (0,8) node [black, xshift=0cm, yshift=.3cm] {$P$};
\draw [ultra thick,blue] (0,7.5) -- +(-50:5cm) node [pos=.5, circle, draw, blue, fill=blue, scale=0.4]{};
\draw [thick,red,-latex'] (2.08,5.92) node [red, xshift=.2cm, yshift=.04cm]{x} -- +(-140:.4cm);
\end{tikzpicture}
\end{frame}
\end{document}

enter image description here

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    i show you how to do this with defining aligned pin in my answer to one of your previous question? you can also use simple pin. sorry, actually i don't understand your question well ... – Zarko Jul 14 '18 at 7:27
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    You can certainly do that, e.g. with path picture. However, I am struggling to understand what that should be good for. – user121799 Jul 14 '18 at 7:27
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    Use a pin for that. You don't need anything as fancy as the aligned pin style though, just a normal one. – Torbjørn T. Jul 14 '18 at 7:53
  • Would you please tell me the code for pinning the arrow! – Hany Jul 14 '18 at 8:26
  • @TorbjørnT., suggestion for aligned-pin is based on one of previous op question. there are also shown, how to use simple pin as i also mentioned in my comment. i thing that this question is duplicate. – Zarko Jul 14 '18 at 8:43
3

Ordinary pins can be found on p. 241 of the pgfmanual.

\documentclass{beamer}
\beamertemplatenavigationsymbolsempty
\usepackage{verbatim}
\usepackage{tikz}
\usetikzlibrary{arrows}
%\usetikzlibrary{arrows, arrows.meta, positioning, calc, intersections, decorations.pathreplacing, decorations.pathmorphing, decorations.markings, shapes, shapes.misc, shapes.symbols, shapes.geometric, patterns}
\begin{document}
\begin{frame}[fragile,t]
\frametitle{}
\begin{tikzpicture}[scale=.9, transform shape]
\draw [thick,-latex](0,0) -- (4,0) node [black, xshift=.93cm, yshift=0cm] {$Q$};
\draw [thick,-latex](0,0) -- (0,8) node [black, xshift=0cm, yshift=.3cm] {$P$};
\draw [ultra thick,blue] (0,7.5) -- +(-50:5cm) node [pos=.5, circle, draw, blue,
fill=blue, scale=0.4,pin={[red,pin edge={red,thick,latex'-}]above right:x}]{};
\end{tikzpicture}
\end{frame}
\end{document}

enter image description here

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  • Just one more modification please, can the pinned arrow be shifted x and y. I appreciate your answer very much. – Hany Jul 14 '18 at 11:07
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    @Hany It an but how much should it be shifted? If you do \draw [ultra thick,blue] (0,7.5) -- +(-50:5cm) node [pos=.5, circle, draw, blue, fill=blue, scale=0.4,pin={[red,xshift=4pt,pin edge={red,thick,latex'-}]above right:x}]{}; then there will be an additional xshift by 4pt. – user121799 Jul 14 '18 at 11:10
  • This shifted the text attached to the arrow, not the arrow itself – Hany Jul 14 '18 at 11:21
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    @Hany Do you want to shorten the arrow? Then try e.g. shorten <=5pt. If you want to move it, try shorten <=5pt,shorten >=-5pt or something along these lines. All of that goes into the curly brackets of pin edge={...}. – user121799 Jul 14 '18 at 11:25
  • That is what I want. – Hany Jul 14 '18 at 11:58

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