Hey Max and GrimFinger,

thank you very much for your comments.

The map is in A2-format. The smallest labels have 6 Pt. That's okay for the print map, but I didn't want to go over 500 K with the file I uploaded here.
(btw: What's the limit of uploaded files in this forum?)

I was definitely aware about some things, but it is far better to hear it from someone with expertise.
Looks like I have to redo quite some things.
I will keep in mind contrast especially - and the fonts, too! ('Attic' is so nineties, meanwhile that font is definitely out)
Thank's again.