/**
* @brief Sets the ROI(Region Of Interest) area of display.
* @since_tizen 3.0
- * @remarks Before set display ROI area, #CAMERA_DISPLAY_MODE_CUSTOM_ROI should be set with camera_set_display_mode().
- * The minimum value of width and height are 1.
+ * @remarks If no display is set, no operation is performed and
+ * the ROI area is valid only in #CAMERA_DISPLAY_MODE_CUSTOM_ROI display mode.
+ * @remarks The minimum value of width and height are 1.
+ * @remarks ROI area can be set before setting ROI display mode. (since 4.0)
* @param[in] camera The handle to the camera
* @param[in] x X coordinate of area
* @param[in] y Y coordinate of area