HP LD4235 41.92-inch LED Digital Signage Display - Manual (Page 36)

1:1 : The aspect ratio is not adjusted from the original. (Only Display Port PC, HDMI PC, RGB PC)
4:3 : This selection will allow you to view a picture with an original 4:3 aspect ratio, black bars
will appear on both the left and right of the screen.
Zoom : This selection will allow you to view the picture without any alteration, while filling the
entire screen. However, the top and bottom of the picture will be cropped.
26 Chapter 5 Using the display