The characters and background in Divine Divinity are in 2D, so there is no way to rotate the view. Lowering the resolution will make things bigger, and maybe easier to see, but will also cut down on your field of view.

With Beyond Divinity the background is also 2D, but the characters are in 3D (the next game, in development, will be full 3D). In BD you can use the mouse scroll wheel to zoom in and out.