Larian Studios Forums Divinity: Original Sin 2 - The Modding Dungeon Divinity - Original Sin 2 - Modding General Terrain Lock ! Grouping items properly! *Raging*

That's a nice tip, I'm going to use that for sure. I had been ctrl+clicking the terrain to deselect it all along when I wanted to move objects en masse and the terrain was selected as a result.