# How the display list selector works at run time

The display list selector shows a list of graphic displays that the operator can choose from. The operator can move through the list and select a graphic display. When the operator presses Enter, the selected display opens.

The operator can scroll through the list and select displays using key buttons or by using the arrow keys and the Enter key on a keypad or an external keyboard.

The display list selector’s behavior at run time also depends on which types of graphic displays are already open and which type of display is opening.

## Use display types

- If the selected graphic display is a Replace display, it closes any open On Top or Replace displays. It does not close any On Top displays that use the Cannot Be Replaced option.
- If the selected display is an On Top (with or without the Cannot Be Replaced option), the display is positioned using the graphic display’s settings.

## See also

Create display list selectors

Set up general properties for a display list selector

Set up states for a display list selector

Causes of run-time errors for the display list selector

Create Key buttons