[Tex/LaTex] Changing the kpfonts \sum symbol

fontssymbols

I like the kpfonts package. It's a nice font and some of the extra symbols it defines are sometimes useful. But I do not like the \sum symbol either in displaystyle or inline. It's too thin and too tall. I tried looking at how kpfonts defines \sum in the hope of just being able to \renewcommand but it does something weird with the maths operators, in order to have package options like fullsumlimits.

How can I get the \sum symbol looking more like the cm sum, for example, without breaking kpfonts package options?

Best Answer

Have a look at the answers to this question.

\DeclareSymbolFont{cmlargesymbols}{OMX}{cmex}{m}{n}
\let\sumop\relax
\DeclareMathSymbol{\sumop}{\mathop}{cmlargesymbols}{"50}

That gets you the \sum from Computer Modern but called \sumop. With kpfonts loaded, that should make the macro \sum respect the various limits option while using the CM sum symbol.