How do I open a map from a campaign in the editor? Auto-translated

I've always been interested in one question, and now it's become quite pressing, so I need to know for sure: is it possible to open a map from a user-created campaign in the editor? To clarify: campaigns have the extension h3c and are essentially just a link between maps. I need to open one of the maps from the campaign in the editor. A user-created campaign, downloaded directly as an h3c file. Thank you in advance for your help.

Added 2 minutes later
Sorry, I figured it out myself. Please close the thread.

And do you know how to open a map from the built-in campaign? For example, from RoE.

Elementary, my dear Watson. Open the campaign editor and export the scenarios.