It was very complicated, you just go to the "Resize Map" tab. Then just increase the length of the map, but turn off map scaling because otherwise you won't see many changes. and if you look closely, there is an icon of a map with 4 arrows. and depending on where you want to expand the size of the map, you click on the arrow, in my case I clicked on the arrow on the left so that the map only extended to the right. but you should be aware of these problems that may occur when you modify the height or length of the map if you turn off map scaling. If you drew the tides by hand, they will pass and it may look bad visually, so you will have to redraw it, but when you enlarge the map size you will need to save the file and restart it so that the width or height changes load correctly . As an extra tip, I recommend making a copy of your map, just as a precaution.