Panasonic DMC-GH3KBODY Owner's Manual page 49

Preparation
[Output]
This sets how the unit connects to a television etc.
[TV Aspect]:
Set to match the type of TV.
W [16:9]:
When connecting to a 16:9 screen TV.
X [4:3]:
When connecting to a 4:3 screen TV.
•
This will work when the AV cable (optional) is connected.
[HDMI Mode]:
Set the format for the HDMI output when playing back on the
HDMI compatible high-definition TV connected with this unit using
the HDMI mini cable (optional).
[AUTO]:
The output resolution is automatically set based on the
information from the connected TV.
[1080p]:
The progressive method with 1080 available scan lines is
used for output.
[1080i]:
The interlace method with 1080 available scan lines is
used for output.
[720p]:
The progressive method with 720 available scan lines is
used for output.
[480p]:
The progressive method with 480 available scan lines is
used for output.
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