I checked the reference manual for the CHUHD and on page 12
The CXUHD supports a special Source Direct mode through its HDMI outputs.
This resolution is recommended for use with external video processors or high-end
TVs. In Source Direct mode, the player works as a “player”. It decodes video from
the discs and then sends the raw video signal in its native resolution and format,
without extra processing, to the external video processor or TV. The actual output
resolution varies by content:
Content Source Direct Output Resolution
NTSC DVD 480i
PAL DVD 576i
On page 14
Zoom
To change the zoom level, press the Zoom button on the remote control repeatedly
pressing the Zoom button will switch the zoom level in the following sequence:
1:1 (No zoom), Stretch/Compress, Full Screen, Under Scan, 1.2X, 1.3X, 1.5X,
2X, 1/2X.
The zoom level is reset to 1:1 when the disc is ejected, or when the player is
turned off.
Note: The Zoom feature may not be available when certain DVD or Blu-ray Discs
are played because the disc author chooses to disable Zoom."