I don't think the interface can be hidden (in any released version of the game, anyway).
For those screenshots, at least the third one was provided by Larian before the game's release, and I'm pretty sure the first two were as well. Many of the early pre-release screenshots did not include the interface, until its form was finalized.
On the PC the camera distance is linked to the angle, and can be changed by moving the mouse forward or back. When the game is paused you can hold the mouse wheel down to pan the camera around.