How do you use the editor in Warcraft

Once you open the World Editor in Warcraft III, you will see a large plain, by clicking the Doodad option (Chose the tray or simply click D) You will be able to build things like: Trees, cages, gates, volcanos in the place you click on. Doodads change depending on the place. You could also click T for terrian, which makes mountains/rivers/canyons, U is for Units, like towers/castles And sometimes for neutral creeps like a Ogre Magi or neutral buildings like a gold mine/ etc. You could use C for camera positions, which could be used in in-game movies, but they are hard to issue. There is also R, regions. You could also choose music to insert in the maps you make, you could also make a companion by banning some upgrades/updates and limiting your units to E.G. Footman/Grunt/Ghoul/Archer. You could manipulate the whole game. However, experience is the best teacher. Try to mess around, and you'll end up making great maps/ cities. Like Lordaeron.