How do I place blocks out of blockspaces?

How do I place blocks out of blockspaces? - Old fashioned golden service bell and reception sign placed on wooden counter of hotel with retro interior

I saw this cool elevator the other day and wondered: how do you place the blocks out of blockspaces, such as for the elevator floor and roof?

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Pictures about "How do I place blocks out of blockspaces?"

How do I place blocks out of blockspaces? - Diligent black female worker setting signboard outside cafeteria at sunny day

How do I place blocks out of blockspaces? - Couple talking while moving in new apartment

How do I place blocks out of blockspaces? - Exterior of worn out medieval stone building with columns located near canal with reflection on water surface in old city

HOW TO USE THE FILL COMMAND ON MINECRAFT

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Images: Andrea Piacquadio, Ketut Subiyanto, Ketut Subiyanto, Rachel Claire