In Apple's UICatalog example, there is a snippet that they wrote to position a toolbar at the bottom of the screen in a navigation controller view (in the ToolbarViewController.m). Code: // size up the toolbar and set its frame [toolbar sizeToFit]; CGFloat toolbarHeight = [toolbar frame].size.height; CGRect mainViewBounds = self.view.bounds; [toolbar setFrame:CGRectMake(CGRectGetMinX(mainViewBounds), CGRectGetMinY(mainViewBounds) + CGRectGetHeight(mainViewBounds) - (toolbarHeight * 2.0) + 2.0, CGRectGetWidth(mainViewBounds), toolbarHeight)]; [self.view addSubview:toolbar]; What I don't understand is why are they shifting the toolbar downwards by 2px (the +2.0 part)? This effectively makes the toolbar look 2px shorter than a normal toolbar. Is this intentional or is there something I am missing here? Thanks guys!