Jtdylktuy

I tried doing, mathbf{Rightarrow}, but nothing happens.

How do I make the Rightarrow symbol bold?

Here is a way with which you can make any symbol fat: use the contour package.

documentclass{article}

usepackage{amsmath}

usepackage[outline]{contour}

begin{document}

begin{enumerate}

item Just the symbol:

contour{black}{$Rightarrow$}



item The symbol between two bold symbols:

$boldsymbol{A}mathrel{contour{black}{${Rightarrow}$}}boldsymbol{B}$



item Using texttt{contour} for everything:

contour{black}{$ARightarrow B$}



item verb|contourlength{0.02em}|:

bgroupcontourlength{0.02em}contour{black}{$ARightarrow B$}egroup



item verb|contourlength{0.01em}|:

bgroupcontourlength{0.01em}contour{black}{$ARightarrow B$}egroup



item Other symbols:

contour{black}{$ALeftarrow B=Cne D$}

end{enumerate}

end{document}

If you would recreate the arrow in tikz, you could control how bold you like it by changing the line width to whatever value you like

documentclass[border=6.662mm]{standalone}



usepackage{tikz}



newcommand{myarrow}[1][0.1pt]{tikz[baseline=-0.26em,y=3em, x=3em]{filldraw[line width=#1] (0.4202,0.0021) .. controls (0.4202,-0.0000) and (0.4188,-0.0018) .. (0.4171,-0.0025) .. controls (0.3917,-0.0092) and (0.3699,-0.0236) .. (0.3509,-0.0401) .. controls (0.3355,-0.0538) and (0.3225,-0.0704) .. (0.3130,-0.0890) .. controls (0.3119,-0.0915) and (0.3094,-0.0929) .. (0.3066,-0.0929) .. controls (0.3028,-0.0929) and (0.2996,-0.0897) .. (0.2996,-0.0858) .. controls (0.2996,-0.0848) and (0.3000,-0.0837) .. (0.3003,-0.0827) .. controls (0.3087,-0.0665) and (0.3193,-0.0517) .. (0.3316,-0.0391) -- (0.1181,-0.0391) .. controls (0.1143,-0.0391) and (0.1111,-0.0359) .. (0.1111,-0.0320) .. controls (0.1111,-0.0282) and (0.1143,-0.0250) .. (0.1181,-0.0250) -- (0.3471,-0.0250) .. controls (0.3611,-0.0137) and (0.3766,-0.0046) .. (0.3935,0.0021) .. controls (0.3766,0.0088) and (0.3611,0.0179) .. (0.3471,0.0292) -- (0.1181,0.0292) .. controls (0.1143,0.0292) and (0.1111,0.0323) .. (0.1111,0.0362) .. controls (0.1111,0.0401) and (0.1143,0.0432) .. (0.1181,0.0432) -- (0.3316,0.0432) .. controls (0.3193,0.0559) and (0.3087,0.0707) .. (0.3003,0.0868) .. controls (0.3000,0.0879) and (0.2996,0.0889) .. (0.2996,0.0900) .. controls (0.2996,0.0939) and (0.3028,0.0970) .. (0.3066,0.0970) .. controls (0.3094,0.0970) and (0.3119,0.0956) .. (0.3130,0.0932) .. controls (0.3225,0.0745) and (0.3355,0.0580) .. (0.3509,0.0443) .. controls (0.3699,0.0278) and (0.3917,0.0133) .. (0.4171,0.0067) .. controls (0.4188,0.0059) and (0.4202,0.0042) .. (0.4202,0.0021) -- cycle;}}



begin{document}



$Rightarrow$ 

myarrow 

myarrow[0.25pt] 

myarrow[0.5pt] 

myarrow[0.75pt]



end{document}

In the modern toolchain, with unicode-math and running either LuaLaTeX or XeLaTeX, you can choose whatever font for bold math you want:

documentclass[varwidth, preview]{standalone}

usepackage{amsmath}

usepackage{unicode-math}



defaultfontfeatures{ Scale = MatchUppercase }

setmathfont{Latin Modern Math}

setmathfont[version = bold]{XITS Math Bold}



begin{document}

(

 p boldsymbol{Rightarrow} q Rightarrow r

)

end{document}

If you want all instances of Rightarrow to be bold, you could select that one glyph from a font with a heavier weight:

setmathfont{Latin Modern Math}

setmathfont[range = Rightarrow]{XITS Math Bold}

In the legacy toolchain, you can load the bm package to get a better boldsymbol, or (with some extra effort) you can import a glyph from your font of choice with DeclareMathSymbol.