A joystick having a movable member that includes a shaft portion and a spherical portion wherein the shaft portion has a diameter less than the spherical portion. For example, one embodiment of the invention detects that a filtering function has been selected for a particular table node and responsively stores elements from the table node within a backup table collection. The first and second RF electrodes are positionable in the elongated delivery device in a compacted state and deployable from the elongated delivery device with curvature in a deployed state. For an image that is available for cropping when incorporated into the design, the image is sized and cropped to create a version of the image that fills the image container. The filter may also include a sharp edge on locator members configured to aid pulling the locator members away from the endothelial tissue. A sub-light-emitting devices including a short-circuit defect is separated from the corresponding one of the pixels and the driving current is supplied to the remaining sub-light-emitting devices, whereby the luminance in accordance with the video signal is maintained.