Samsung Galaxy NX500 Camera User Manual (en)

Camera settings menu > 

User settings

Center Marker

Set to display a cross-shaped center marker in the center of the screen. Use 
the center marker to set the vertical and horizontal levels. You can set the 
size of the center marker or apply effects to it.

* Default

Set to turn the center marker on or off. (Off*, On)

Set the size of the center marker. (Large, Normal*)

Set to apply a transparency effect to the center marker. 
(Off*, On)

The center marker is displayed even while the camera is recording a video.

Key Mapping

You can change the function assigned to the Custom button, the AEL 
button, the EV button, or command dials 1 and 2.

Set the Custom button‘s function.

* Default

Execute the Depth of Field Preview function for the 
current aperture value. (p. 24)

Execute the Custom White Balance function.

Save a file in the RAW+JPEG format. To save a file in 
JPEG format, press the button again.

Enable or disable the HDR Dynamic Range option.

Switch to Video recording standby mode.