How are you saving the PDF?
Are you printing to a 3rd party PDF converter or are you publishing (saving as PDF) - hence using Archicad's built in converter.
I find publishing is the best option.
I have found that using a 3rd party PDF converter (printer) can cause problems with fills not appearing correctly - although I have not came across this zoom issue.
Barry.
One of the forum moderators.
Versions 6.5 to 25
Dell XPS- i7-6700 @ 3.4Ghz, 16GB ram, GeForce GTX 960 (2GB), Windows 10
Dell Precision 3510 - i7 6820HQ @ 2.70GHz, 16GB RAM, AMD FirePro W5130M, Windows 10