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The map tree can be easily enabled: there is a MapPropertiesTree button at the top of the editor.
Manuals can be found in the game folder/Editor Documentation.
For scripts, see the corresponding topic in this section, and you can find one of the most relevant examples in the FAQ.
Added after 14 minutes
Setting up a quest through the map tree looks almost the same as setting up a prophet's hut.
Added after 14 minutes
Setting up a quest through the map tree looks almost the same as setting up a prophet's hut.