So I've been trying B27 (from the HIB), trying the campaign, and not worrying about the planet being slightly less than fully visible because it never affected any of the scenarios before that I played. And now, on Day 7 of my campaign, theres a gold site that is completely offscreen for me (its in the far south of the planet), unless I'm at 640x480 or 800x600 resolution, which will both not break and show the full planet without cutting any of it off. (which refuses to 2x window on my 1366x768 laptop screen, and since the fullscreen option only appears after that I can't try fullscreen).
I'd really like to be able to continue my campaign without needing to squint at the screen to read anything, could anyone help with this?

Have you tried increasing the resolution then putting the game in fullscreen?

Huh. Apparently 800x600 fullscreen works better than my laptop's resolution in fullscreen for showing the full planet? No idea why that works that way but at least I can continue my campaign with (slightly smaller) text.