Dragging and dropping an image into CC3+ is the equivalent of doing a Draw -> insert image, but it skips the dialog box. Unfortunately, this also means it skips the dialog where you can turn off the border, and uses the default which is applying a border to inserted images.

You can turn this off by using :CC2EDIT: on the images, and turn on the hide outline option. Unfortunately, this can only be used on one image at a time (Don't worry about the purple selection rectangle this operation seems to leave behind, that goes away the next time you select something else)

The better way to insert symbols to avoid this in the first place is to do as Raiko suggested, and use the :ICON_CATALOG: button and browse for your folder. This will show all the images in that folder in the symbol catalog window, and you can insert them the same way as regular symbols.

If this is symbols you are going to use often, the even better option is to make proper CC3+ symbol catalogs for them. This allows you to set up scaling and things correctly in the symbols themselves, so you don't have to re-scale every image inserted, among other things.

Yea. The default behavior of drawing tools and symbol sis to pick their own sheet. This can seem weird/annoying at times, but generally one tends to end up putting things in the wrong places much more often if they didn't do that, so the net result is that this behavior is quite nice.

Note that (almost) all these tools are prefixed based, for example the landmass tool in most overland styles look for a sheet name starting with LAND. If your current sheet does so, it stays on that, if not, it goes to the main LAND sheet. You can use this when you create new sheets to get the tools to put things where you need it.

The WBC is a collection of previous published articles. They have been cleaned up, organized, and formatted for publishing in a pdf format, but they don't contain any new information from the original articles. It's a mix of articles that talk about word building in general, and articles that focuses more on the CC3+ side of things.

There's also some additional tutorials bundled with it which I haven't been able to look over, but I believe those are sourced from the annuals.

To change it to straight, right click :CC2EXPLODE: and pick the Smooth to Straight command to use on your poly. The process is also reversible with the straight to smooth option.

(Keep in mind that it will be easier to notice the difference inside CC3+ than on the exported image)

[When you convert the coastline to straight, you may notice a weird spike near the top left. This is caused by you going back and forth when placing the nodes, causing the lines to pass over each other and create a really sharp angle. I noticed it earlier, but the smooth polygon kind of hides it much more effectively than a straight one, so you may wish to go in and remove the offending node with :CC2DELNODE:. The node is located in the middle of the "cross" where the line spikes, not at the edge of the spike.]

I talked to the developer, and it seems it is the complexity of the coastlines that is causing the problems. It's only 5000+ nodes, but it is a smooth polygon, which increases the rendering complexity of the entity considerably, to the point where it is causing an issue if too much of it is rendered in one go.

One workaround is to do as you did, reducing the size of the bands, creating more passes, but less complexity for each pass. You could also turn the coastline into a straight polygon instead of a smooth one, as this will reduce the complexity considerably, but this may or may not change the appearance on the final map (Well, it does change the appearance, it is more if the difference is really large enough to notice or not, you can't zoom into an exported image as far as you can the CC3+ map itself anyway.) Note that you also have a landmass poly below the coastline, which is just as detailed.