TikZ is a higher-level drawing language built on top of the PGF graphics framework. For questions specifically about the PGF layer use {pgf-core} instead. Both tags are possible on the same question. The tag {diagrams} is also compatible with this tag.

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15
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Why does PGF/TikZ 3.0 draw my simple layered graph as non-planar by default?

I have two questions: If I’m reading §30.4 “Crossing Minimization” of the PGF/TikZ 3.0 manual correctly, the layered graph drawing algorithm should have crossing minimization enabled by default. So ...
6
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1answer
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Are the TikZ libraries cd and external incompatible with one another?

Is there a way to use the TikZ libraries cd and external together? This does not work: \documentclass{article} \usepackage{tikz} \usetikzlibrary{cd, external} \tikzexternalize \begin{document} ...