Panasonic Viera TX-L32C4B Operating Instructions Manual page 17

Aspect
Change the aspect ratio (image size)
If you would like to change the aspect ratio manually
1
Display Aspect Selection list
Note
Display subtitles
DVB mode
Display / hide subtitles
[Preferred Subtitles] (p. 31)
Analogue mode
Display subtitles
Note
2
While the list is displayed,
select the mode
Aspect Selection
Hide subtitles
17