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This follows from a previous post In the figure form, how to adjust the whole size of "text" and "math" format at once?,

In the figure form, how to adjust the whole size of "text" and "math" format "as a combined figure" at once, from the twocolumngrid to onecolumngrid? (say in the revtex)

My trouble is that in the "twocolumn" format of revtex4-1, if I use the following method @Herbert,

documentclass[aps,prl,twocolumn,superscriptaddress,floatfix,letterpaper,nofootinbib]{revtex4-1}

usepackage{mathtools,amssymb,varwidth}

usepackage{showframe}





begin{document}





onecolumngrid

begin{widetext}



begin{figure}[!h]

centering

begin{center}

resizebox{linewidth}{!}{%

  begin{varwidth}{linewidth}

begin{gather*}

 overbrace{underbrace{A times B}_Etimes

               underbrace{Ctimes {D}}_{EFG}}^{text{ABCDEFG}}\[-normalbaselineskip]

    underbrace{hphantom{Atimes Btimes Ctimes D}}_{text{family}}

   end{gather*}

  end{varwidth}}

 end{center}

  caption{}

end{figure}

end{widetext}

twocolumngrid



end{document}

I got:

This is not what I wanted. I want to have the figure stand in the middle, with adjustable size (likely 2/3 or 3/4 of the document width).

However, the "begin{gather*} end{gather*}" seems to make the trouble.

If I remove "begin{gather*} ... end{gather*}" to simply use "$...$", I got a compilation problem and a troublesome output, where the "braces" are making troubles in the wrong position:

PS. My last figure is what I am hoping to get (with tunable size, like 2/3 or 3/4 of the whole document width). But it shall also be scale-invariant as the same smaller one as the one in my first figure. The code should be also compilable.

Edit 1: This seems to cause the trouble \[-normalbaselineskip], which outputs "LaTeX Error: There's no line here to end."

My following attempt can not be compiled fully:

documentclass[aps,prl,twocolumn,superscriptaddress,floatfix,letterpaper,nofootinbib]{revtex4-1}

usepackage{mathtools,amssymb,varwidth}

usepackage{showframe}





begin{document}





onecolumngrid

begin{widetext}



begin{figure}[!h]

centering

begin{center}

resizebox{linewidth}{!}{%

  begin{varwidth}{linewidth}

$

overbrace{underbrace{A times B}_Etimes

               underbrace{Ctimes {D}}_{EFG}}^{text{ABCDEFG}}\[-normalbaselineskip]

    underbrace{hphantom{Atimes Btimes Ctimes D}}_{text{family}}

$  end{varwidth}}

 end{center}

  caption{}

end{figure}

end{widetext}

twocolumngrid



end{document}