What is the addon for working with the camera (through which we see the whole scene when working with models like in a unit) in blender?

Question

Blender

Good day to all! Please tell me the addon for working with the camera (through which we see the whole scene when working with models like in a unit), but only in a blender, otherwise a map or something else is not convenient to edit.
Switching to the creation of a map in the engine, please do not recommend it is not suitable.