Greetings.. How can we show more than one building in the field we are modeling? For example, I am designing a website. I am designing a project with 4 blocks on the land. There are 150 cm elevation differences between the A block and the other blocks. should I create all the blocks in separate drawing files or should I make all the blocks in the same drawing file? How should I show the land course ground elevations and the Leveling ground elevations? Good work...