When you're in the middle of article, and you show no interests on it. You want to collapse the article, back to the list view to overall rest of article, but when you try to click top-middle position to collapse it, you realize you've to scroll page up, so you can collapse it with its title. Or you've to scroll page down, expand next title and collapse it again to have an overall view. And these useless scroll up/down, expand/collapse is really crazy.