Why doesn't the integral sign with Pagella font scale with content?

Default font gives

Pagella gives

Is there a solution to this? Thanks!

Hi, welcome to the Typst forum! I’ve adapted a bit your question title to match our guidelines.

I think your problem is actually unrelated to the font: by default the integral sign is not scaled. It’s just that the default font (New Computer Modern Math) has a larger symbol than TeX Gyre Pagella Math.

You can scale the symbol manually if you want:

#show math.equation: set text(font: "TeX Gyre Pagella Math")

$
  stretch(integral, size: #3em) ((sqrt(f) + 1/2 g t sqrt(f) + epsilon(t))^4 - sqrt(f)^4)/t
$

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The integral is not affected by lr alone. But here’s a late discovery, lr + mid do work together to stretch the integral:

$ lr(mid(integral) f(x) / g(x) dif x) $

bild

But this does not work with integration limits, unfortunately.

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