The V-1SDI gives you the power to adjust the HDMI input Channel 4. Here's how to change the parameters:

1. Press and hold the SETUP button for 2 seconds
   
   
2. Menu "Page 1/16" should appear on the Multiview screen
   
   
3. From the Menu screen Select the SCALING TYPE option
   
   
4. You can switch between FULL, LETTERBOX, CROP and DOT BY DOT
   
   
5. Here is what each of the do:
   
   
   • FULL: This always displays the picture expanded to full screen, irrespective of the aspect ratio of the input video.
   • LETTERBOX: This expands the input video to match the horizontal screen resolution while maintaining the aspect ratio. The protruding picture is cut off at top and bottom.
   • CROP: This expands the input video to match the vertical screen resolution while maintaining the aspect ratio. The protruding picture is cut off at the left and right.
   • DOT BY DOT: This performs no scaling.
     
     
6. Additionally here are some other option that you can use for scaling:
   
   
   • H. POSITION: This adjusts the display position in the horizontal direction.
   • V. POSITION: This adjusts the display position in the vertical direction.
   • ZOOM: This adjusts the zoom ratio.