Edit PDFs for science

_Simple: Keynote_
1) drag and drop pyplot (pdf export) or compiled latex (as pdf) or standard latex (via keynote equation editor or latexit) into keynote
2) do whateva editing in keynote
3) Export as PDF and crop somehow

_Edit in Illustrator or Affinity Designer_
1) Export as PDF
2) in some cases (when you want to convert text to paths): convert pdf to svg and back to pdf
3) open in illustrator or affinity
(there also seems to be a trick to create canvas first and then imoprt pdf, maybe also conversion through keynote works)

_Latex in to illustrator_
1) use Latex it (https://www.chachatelier.fr/latexit/)
2) use inline modus and make sure "pdf with ..." and "SVG" are activated
3) drag and drop into Illustrator
4) In illustrator you might have to remove some additional objects for some reason (alternativly select the latex-text with the amgic wand tool)

_Export Settings_
Also this one seems to work:
import matplotlib
matplotlib.rcParams['pdf.fonttype'] = 42
matplotlib.rcParams['ps.fonttype'] = 42
(http://jonathansoma.com/lede/data-studio/matplotlib/exporting-from-matplotlib-to-open-in-adobe-illustrator/)


_Render paths in PDF_
print with macOS print menu
or export as PDF