Current questions and answers regarding the map editor.

When you select a regular hero on the map, their properties tree appears. In it, you need to find "Shared" and click on the value (the "value" column). Two buttons will appear: "new" and "...". Click on the ellipsis, and a window with the hero's general properties will appear. Somewhere at the end of the window, on the right side, there are two values: "ScenarioHero" and "HideInEditor," which should be set to "false." In the left part of the window, you can select a hero.

The list of allowed heroes is here: /MapObjects/_(AdvMapSharedGroup)/Heroes/Any.xdb