SimTower
Start with $4 million
Begin a new game and attempt to place a lobby section all the way to the bottom and the left of the edit screen.
Two-story lobby
When placing the first lobby section, hold [Ctrl].
Three-story lobby
When placing the first lobby section, hold [Ctrl] + [Shift].
Automatic removal
When placing a new unit over an existing item, hold [Shift].
The image featured at the top of this post is ©The Legend of Heroes: Trails of Cold Steel III key art / Original