Script Gui Help!

[anon_67728761]

Hello, I was wondering how you would make a script that has a visual interface such as the built in terrain script? Is it in the script or is there a GUI editor or something? Here is the picture

[j_y_k]

Would this be for the editor (e.g. a custom inspector or window), or in-game?

[shawn_1]

Unity - Scripting API: Editor

[anon_67728761]

thanks!