Current questions and answers regarding the map editor.

How do you give a Knight the Necromancy skill?

There are many ways, depending on what you want to achieve.
1) Place the hero on the map, go to the properties tree, and in the primary skill field, change the standard skill to Necromancy. The map will become a mod, and this hero will have Necromancy on all maps as long as your map is in the maps folder.
2) Do the same as in the first method, but create a new hero with a unique name and customize him to your liking. The map will not be a mod.
3) Give the Necromancy skill using the GiveHeroSkill() function.
4) Make the hero a Necromancer without the Necromancy skill using the MakeHeroNecromancer() function.