Again, I suspect the OP simply wants to be able to hold down the ALT button to help spot loot that's dropped after a battle (or items he himself has tossed on the floor) without it also revealing everything hidden around him in the process.
Since everything revealed when holding down the alt key is tied to your character's perception, rather than peppering the screen with text labels it might have been nicer to see a small, pulsing twinkle effect on areas worth inspecting, and perhaps the label only appears when you mouse over it for more information.
not according to what the OP wrote:
Please give us a option to deactivate this highlight function or better deactivate this completely
so, if he wants the the highlight function to be completely off, he simply need not hit the ALT key.
