You probably are saying, "What are long brushes?" or "What the heck do I need them for?". Normally, brushes are square, but if you want to, you can make them rectangular. This is useful if you need to make a straight piece of elevation, road, or anything else. You will need the New Editor (any that has the Hollow Square) or the Map Editor Patch.

• Click on brush settings. On the old editor's brush setting window, set the shape to circle.
  
• On the New Editor's brush setting window, set the size to the length you want the brush to be.
  
• On the old editor brush setting window, set the shape to square. This should give you give you a rectangular brush.
  

The only problem is that it only goes one way across the map.