Well, it looks ok, but I have a pretty major suggestion that might not be very welcome.

I've never thought it was a good idea to mess with plate tectonics on a fantasy world. We always want to have far too many land masses, not enough open ocean, and way too many mountain ranges all over the place (the area taken up by the Earth's mountain ranges is somewhere around 15% of the land surface, which is far less than you typically get on the average fantasy world). On a fantasy world the resulting mass of plates required to explain an excess of mountain ranges far exceeds a realistic number of plates. The earth itself only has 15 principle plates.

On top of that problem, a major subduction zone will tend to create thousands of miles of long smoothly curving coastline, like the Peru-Chile trench. You don't have even just one such coastline to be able to set up something like that. So my advice would be to gently persuade the client away from including the PT of his or her world. Everything else will probably look, feel, and work so much better without it.

Maybe if you thin them out as they get closer to the snow line so you end up with a sort of edge fade, but done in tree symbols?

The white screen can be hidden by hiding the SCREEN sheet, in the Sheets and Effects dialog.

You can show or hide any of the map parts by showing or hiding the sheet those parts are on. If you aren't sure what sheet something is on you can find out using List in the Info menu.

If you want to align the map with the scroll a bit better once you get rid of the screen, I would move the scroll rather than the map. You can do that using the Move tool |CC2MOVE|

Or... you can use the freehand drawing tool on a sheet with a slight Displace effect, followed by a subtle Blur effect to knock off the edges. Give yourself a bit of a line width as well. No pen or pencil has zero nib width like a vector line.

Possibly the best psuedo-hand drawn lines I've seen are the ones that @Lillhans draws ;)

You're welcome :)

Now click the :CC2PRESETS: button and then click the Attach to Drawing button in the dialog that appears and save the file.

We might never know how that happened, but if you get into making your own palettes in the future those top 2 rows must always be left as they are because they affect the colours of the interface.

In answer to your question - the default palette is used in the vast majority of templates, though there are a few styles that have their own variation of the palette, like the one I just showed you.