If you want a smaller area, I suggest you look at an area on one of the existing regional maps rather than straight on the continent map. That should allow you to find something more akin to the scale it sounds you are looking for. Or you can make 2 maps, do this larger scale one, and then develop a section of that map further on the second map.

But as for adding features like a lake, of course. The basic premise with any atlas is that there will always be features that are too small to appear on the higher level maps, that will only appear on a detail. Main idea here is to just keep it small enough that it wouldn't realistically appear on the world map (Which in general would mean smaller than any lake that do appear on that map.) But do make sure to add lots of interesting features, that's part of the fun, and allows other mappers to make interesting detail maps from your map.

Thanks for joining in @Kertis Henderson

As Quenten said, just go ahead. I won't register the claim in the atlas right now, but there shouldn't be anyone else desiring that area presently.

One hint about that area though, even if it is a small area of Doriant, Doriant is a huge continent, so that area is pretty large. About 500 by 350 miles, or 175 000 square miles, almost the size of the entire country of France, or a bit larger than the entire US state of California. The lake is about the size of Lake Ontario. Keep that scale in mind when deciding which features will realistically show up on the map. Those red dots on the continent map would represent some of the biggest cities around, capitals and metropolises.

Well, guess it was more or less what I expected. A lot of companies likes to lock down their artwork.

That is actually one of the advantages to buying CC3+ and add-ons, as you are free to use the art with whatever program you choice. You can't redistribute the actual art files, but no matter if you make the map in CC3+ or in Photoshop using our art, you can still use the map commercially.

Thanks Kevin. The map is now in the atlas. Welcome as a contributor, it is much appreciated.

That linked area do get a bit small though, very hard to see. Maybe someone wants to make an intermediate map showing the surrounding reef area in more detail.

(This will be the last map I add for a couple of weeks)

Menina Island can now be found in the atlas. Thanks.