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I want to draw a circle of 4mm with minus sign inside it. I have set the m style:

\tikzstyle{m}=[circle, thin, draw=red, fill=red, minimum size=4mm]

however the minus sign extends the circle. I want the sign to almost fill the circle. I tried to change the line to be:

\tikzstyle{m}=[circle, thin, draw=red, fill=red, size=4mm]

but it didn't work.

How can I set the circle size to be fixed?

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    I usually just keep the circle empty, and add another node, at the same coordinate, that holds the text.
    – Ran G.
    Jun 20, 2011 at 1:41

1 Answer 1

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TikZ automatically adds separation between the text and the node border. When setting a minimum size for a node, it's usually a good idea to set inner sep=0pt:

\tikzstyle{m}=[circle, thin, draw=red, fill=red, minimum size=4mm,inner sep=0pt]

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