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Suppose my tikzset definitions include:

 vector/.style={% decoration={markings, mark= at position 0.5 with {\arrow{Triangle[length=2.5mm, width=2mm]}}}, postaction={decorate} },

And suppose I need to use the same arrow style elsewhere. How do I define some arrow style and refer it later? Something like (which doesn't work):

\tikzset{% myarrow/.style={ \arrow{Triangle[length=2.5mm, width=2mm]} }, vector/.style={% decoration={markings, mark= at position 0.5 with {myarrow}}, postaction={decorate} }, }
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7

Use the keyhandler /.tip:

\documentclass{standalone} \usepackage{tikz} \usetikzlibrary{arrows.meta,decorations.markings} \tikzset{ myarrow/.tip={Triangle[length=2.5mm, width=2mm]}, vector/.style={ decoration={markings, mark= at position 0.5 with {\arrow{myarrow}}} }, } \begin{document} \begin{tikzpicture} \draw[-myarrow](0,0)--(2,0); \draw[myarrow-{myarrow[red]}](0,-.25)--+(2,0); \draw[postaction={vector,decorate}](0,-.5)--+(2,0); \end{tikzpicture} \end{document}

enter image description here

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