This is the supermacro button
Then find something to practice on, i have used coins in this case & a angle table lamp
partyly depress the shutter button untill you see a big magnified oblong come into the main screen like the pic above , then while keeping your finger on the partly depresed shutter button slightly move the camera back and forth untill the focus is what you think is right once you get it in focus press the shutter button down
What the end result looks like
Just practice on anything & everything , one tip though, for taking shots in this mode yo