Opening the editor
The Scenario editor is on the main menu. Start a new scenario with two towns and one objective, start from the arena or tower defence templates, or open one of your own files. It works offline like the rest of single-player.
Shaping the map
Choose the map's size, look and seed, then paint terrain with a brush, a line, a rectangle or a fill, and plant forests. Place units, buildings and resources for any player, and delete or select them again. Undo and redo are always a tap away; press and hold a placed piece to edit it.
Players, objectives and triggers
Each player can be a person, the computer or scripted. Write the briefing, set objectives, and mark areas of the map. Triggers make the scenario react: when a condition is met, such as a unit reaching an area or a building falling, an action runs, such as a message, new troops or a victory. The briefing screen can also change some of the match's rules.