If I wanted to play a hidden object game, I would get a Denny's kid's menu.
The alt button needs to show me everything my characters can see, not just a random smattering of items that don't seem to have any real rhyme or reason. The point of the tab key in the originals was to show me all the things on the screen that were small or hidden because my characters knew it was there. It wasn't my job to get a magnifying glass out to verify if those 5 pixels were an item or a rock. Though sometimes it was the rock that just happened to have a secret compartment that my characters found.
Please make this button consistently show me the items/traps/secrets that my characters have found.