Sony HDR-CX450 How To Use Manual page 139

Even if the memory card is replaced with another one, the file number is assigned in
sequence.
Reset:
Assigns file numbers in sequence, following the largest file number existing on the recording
medium. When the memory card is replaced with another one, the file number is assigned
for each memory card.
[155] How to Use
Data Code
During playback, this product displays the information recorded automatically at the time of
recording. You can check the following information.
1. - [Setup] - [
Descriptions of menu items
Off:
Data code is not displayed.
Date/Time:
Date
Time
Camera Data:
Movie
Photo
Menu operations
Playback Settings] - [Data Code] - desired setting.
Setup