Is the grab function gone? I can't seem to find it anywhere. I hope it's not gone. How do you decorate a house and move stuff around if it is? Also any way possible to see my character in full?

Hold down the button.

Edit: And to see your character in a rotating view? Hold down the button.

Hold down the 'E' key to pick up an item and move it around. You only need to hold the 'E' for a few seconds to pick it up. Tap it again to let go of the item. On consoles I have no idea.

Sorry ps3. Hold down what button. Also when do I do it for rotating the character, in the menu?

....but WHAT is the button to Grab?

You know the button you use to interact with stuff? Hold it down.

And there is no more character view in the menu. So you know the button you press to see your character in 3rd person? Hold it down.

On whatever system you're on, you hold down whatever button you would use to take the item. You tap the button again to put it down.