Well, I just made a map, it's almost ready but it looks small and appears to be in a corner but if you make zoom all details are there, and when I changed it to testing and went to single player it still looked the same way in the preview so I'm not sure how to make it look normal (In the center instead of a corner), any ideas?

Open your map in Inkscape (or whatever program you're using), select all the map elements and enlarge it. Pay attention to borders of the document that are displayed in the program because whole 'page' is being displayed according to them.

Make your map according to the size of your file. If you file is much bigger than your map then that will show in the map editor as you described. So either enlarge everything youve drawn to fit within the map borders. Or decrease the size of your file so it fits perfectly with your map.

Well, I could try to increase it if it wasn't for the fact that if I do so it sticks out of the page which I cannot make big enough because of the limit, and if I do it anyways troops are way too small so I'm not sure if it's ignoring the page borders or what because it fits perfectly in the page but it still appears cornered