Ah, of course, I didn’t think to look at \scriptfont3. It’s been a long time since I’ve looked this deep into TeX internals. -dh > On 2 Oct 2020, at 04:21, Ulrike Fischer <[log in to unmask]> wrote: > > Am Thu, 1 Oct 2020 22:47:31 -0500 schrieb Don Hosek: > >> While looking into this question https://tex.stackexchange.com/questions/565031/slightly-bigger-integral-in-exponent <https://tex.stackexchange.com/questions/565031/slightly-bigger-integral-in-exponent> I found that the formatting of \int differs slightly when using the amsmath package vs the base LaTeX with the former using a scriptstyle integral while the base uses a textstyle integral. > >> So the questions are: (1) what’s happening differently in amsmath >> to change the appearance of the integral > > amsmath use a different cmex font: > > cmextra/cmex7.pfb instead of cmex10.pfb because of this code part > > > > \ifnum\cmex@opt=7 \relax > \DeclareFontShape{OMX}{cmex}{m}{n}{% > <-8>cmex7<8>cmex8<9>cmex9% > <10><10.95><12><14.4><17.28><20.74><24.88>cmex10% > }{}% > \expandafter\let\csname OMX/cmex/m/n/10\endcsname\relax > \else > > you can get the "classical" appearance with > > \usepackage[cmex10]{amsmath} > > >> and (b) which is the correct behavior? > > Well like always, it is a matter of taste, but I would say they made > the change because they think it looks better like this and I agree. > > > -- > Ulrike Fischer > http://www.troubleshooting-tex.de/