No, the "world maps" zoom works fine. It's the clipboard maps I'm having trouble with. When I try and enlarge the clipboard it starts to enlarge, then immediately pops back to the original size.
Then you're near the max the clipboard can enlarge. That's all it's got I'm afraid.
It only gets so big then it pops back a bit. Yup.
I did the same thing because the color of the field maps and the abbreviations of what things are is so similar I had to max the size of the clipboard just to see stuff.
They are making color coded maps. Check the "General" forum for the link to download.