Not sure if this is a problem, but this area to the left doesn't look correct with the bottoms of buttons looking chopped off and the inventory button hidden the way it is.

Is that how it should be?

Is this the very beginning of the game? Everything is fine. In Under A Killing Moon and The Pandora Directive, inactive buttons actually look like this.

Inventory button will be active when you pick your first item. Look down - there are items on the floor to pick up.
Arrows will be active when you get much items (I think more than 12) in the inventory.
Use, Combine and Examine buttons will be active when you mark one of your inventory items.

It is indeed from the beginning of the game. When it looked like that in the menu, I thought I'd see what it looked like in the game and it was the same. So I was worried there was a problem with it.

Thank you for the answer!