The camera item may also be interactively modified in the 3D viewport while in 'Items' mode (camera items have no editable components). Use the standard transform tools to move (W) and rotate (E) the camera. When making fine adjustments, users may find it easier to see how the camera is viewing the scene. This can be done by changing the viewport view button in the upper left to 'Camera'. When set as such, black bars may be drawn over the viewport if the aspect ratio of the 'Frame Size' is different from the viewports aspect ratio; the area inside the bars represents the area of the scene that will render when a render command is invoked. To position the camera while in this view mode, various keyboard/mouse options are available--