Show Sample Dynamic Object in Editor

Unity Engine
1

I have a tiled layout which is dynamically constructed at runtime. This means in the editor, it just ends up totally blank.

What is the best way to display something in the editor so I can position the object, and then replace it with the real thing when the game actually runs?

2

Run the game, select the object copy the object exit play mode paste the object, reference the object on start delete the object

I totally understand I have done this with hex grids and chess boards