Palatino

I couldn't understand your problem at first. Then I noticed that it is only a problem when using medieval mice. Everything is great with a trackpad. Please no restrictions.

/Users/color-fan-tastic/Library/ColorSync/Profiles/

I agree. The yellow tones of the HKS pallet do not seem to be correct. HKS 2 as well as HKS 3 are cool yellow.

Selection when opening the designer file:

That's what I had in mind. Adobe won't be interested in supporting the escape of its customers.

Because I have only a few old InDesign files, I don't care about the import function. Just out of curiosity: Does Affinity need Adobe approval or even their cooperation for the function, or is the interface "public"?

Genau so.

Export > PDF > More > Text as Curves

(Ich spare mir jetzt mal die Übersetzung.) Das ist dein Fehler. Du hast D50? Das ist so ähnlich wie sRGB, nur in Grau – wie der Name schon sagt ein Monitorprofil. Für dein Endergebnis ist egal, ob du ein rein schwarzes Druckprofil oder ein CMYK-Profil nimmst – wichtig ist die Beschränkung auf den Schwarzkanal. Und keine anschließende Konvertierung! Es gibt im Zusammenhang mit dem Grau-Arbeitsfarbraum auch noch einen Bug, aber auf dessen Beseitigung würde ich nicht warten.

Exactly. And the trouble starts when I want to print 100/50/0/0 and nothing else. This only works with high-end printers or additional RIP software.

Maybe the dot is missing.

You will have to search a long time to name an ink or laser printer that is controlled by CMYK. And at best you will find what you are looking for in the high-end sector.

On the one hand, you're right. On the other hand, I wouldn't use CMYK if I knew the inkjet or laser printer was working with RGB. The many conversions don't help the colors either. There are far too many sources of error.