For the last several years, Topps' flagship set has featured Highlights, team cards, All-Star game cards, and checklists. Trouble is, all of them use regular action photos just like the base cards, without any conspicuous markings otherwise. You have to squint and read the fine print to know what you are actually holding.
So if you didn't know already, which of the following cards is Ichiro's base card and which is the highlight? I've blacked out the line underneath that gives it away. But you see it's only a tiny area on the card that makes the difference.
Now if they put something on the front to distinguish the highlight card, it would be much easier: