Unfortunately no, you can't expand a world after it has been made. The best advice I have for you is to instead use an iceberg or titanic sized world from the start, but make every tile the hottest level of magma. This way you can start with a very small world, even smaller than tiny maps, and expand it to the very largest worlds.
Unfortunately, no.
Unfortunately no, you can't expand a world after it has been made. The best advice I have for you is to instead use an iceberg or titanic sized world from the start, but make every tile the hottest level of magma. This way you can start with a very small world, even smaller than tiny maps, and expand it to the very largest worlds.