Sony DSC-RX100 How To Use Manual page 118

You can set the time by which the power goes off automatically.
1. MENU →
Menu item details
30 Min/5 Min/2 Min/1 Min
Note
The power save function is not activated when power is being supplied via USB, when
playing back slideshows, when recording movies, or when connected to a computer or
TV.
[136] How to Use
Demo Mode
The [Demo Mode] function displays the movies recorded on the memory card automatically
(demonstration), when the camera has not been operated for a certain time. Normally select
[Off].
1. MENU →
Menu item details
On:
The movie playback demonstration starts automatically if the product is not operated for
about one minute. Only protected AVCHD movies are played back.
Set the view mode to [AVCHD View], and protect the movie file with the oldest recorded
date and time.
Off:
Does not show the demonstration.
Note
Even if [On] is selected, the product does not start a demonstration if there is no movie file
on the memory card.
When [On] is selected, the product does not switch to power save mode.
[137] How to Use
(Setup) → [Pwr Save Start Time] → desired setting.
Changing settings
(Setup) → [Demo Mode] → desired setting.
Changing settings
Setup menu
Setup menu