Yes, as long as you don't touch the actual art files (png files) on disk, it will work just fine for the atlas. It is only a problem for the atlas if you bring your own art files, or modify the official ones (including moving/copying/renaming them).

But anything that is done in-map, like importing existing fills from valid products, or changing the settings for them in the fill dialog is fine. (With one caveat, if you import official fills using the import bitmap fill style tool, DO NOT check the "Create Other Resolutions" checkbox, as if the files didn't have multiple resolutions already (Like all the solid xx fills), it would basically be creating new files for you based on the original ones)

That's a pretty good question. The earliest map I could find in my collection that I actually made and used for a game is dated 2005, but that was not the first time I used CC.

I think my first encounters was with the cut back version - Campaign Mapper - which shipped with the Core Rules 2.0 product back in 1999. I remember picking this up pretty early after it's release. I think I also got the FR Atlas around that time, probably around 2000.

Most of my early maps were simple modifications of the FR Atlas maps.

I find overland the most meaningful ones. Knowing the layout of a city is nice, but knowing the lay of the land is far more important. Most of the maps I produce for my own campaign are overland ones.

If the symbol catalog buttons doesn't load correctly, it is usually an indication that the master filter was not loaded with the map. Which it should absolutely do with the Modern Political maps.

Can you try loading the filter manually => Right click :CC2SYMPATH: and pick master filter settings, from that dialog, hit LOAD and pick the CA42 filter in the list. Now, the dialog should look like the below image. Make sure filter 1 is the selected one in the dialog before hitting ok, and try the buttons again.

Anything that makes two entities do it by adding both a main entity and the outline. In Sue's first screenshot above, you can see there are two buttons, "Properties", which lets you change the settings for the main entity, and Outline, which lets you change settings for the outline entity (Which doesn't actually have to be an outline, it was just named like that because that was it's initial purpose)

When you are dealing with with and outline entities, just change it both places. Keep in mind that the values were probably just a tad different originally, so keep that difference in your changed versions.