Samsung 400EX(N) - Manual (Page 73)

Settings Value Display In Multiple Display Mode
When there are more than one displays connected, the settings values are displayed as follows.
1. No selection: Displays the Factory Default Value.
2. Selected one display: Fetches and displays the settings value for the selected display.
3. Selected one display (ID1) and add another display (ID3): The program, which was displaying the settings value of
ID 1, fetches and displays the value of ID3.
4. If all sets are selected at the same time by clicking All and Select, the default value will be restored.