# Use the MoveLeftButton and MoveRightButton to view diagnostic messages

The MoveLeftButton and MoveRightButton objects can be added to the diagnostic graphic display to view messages that are too long to be viewed on the display. When selected, the buttons are used to scroll the message content across the display.

Tip: | An asterisk (*) shown at the end of a message indicates the full message is not shown

How the buttons work at run time:

- When the MoveRightButton is selected, the message moves six characters to the left. When the MoveLeftButton is selected, the message moves six characters to the right. The buttons can be selected as needed to view additional characters.
- When either button is selected, all messages that are displayed in the list move accordingly.
- When either button is selected, updates to the diagnostic list are temporarily paused.
- If there are no messages on the diagnostics list (for example, if a Clear All operation was used), the MoveLeftButton and MoveRightButton do not work.
- When either button is selected several times and then followed by another key button (such as Home, End, and Page Down), all of the properties of the MoveLeftButton and MoveRightButton are reset. In this case, all messages are displayed from the leftmost characters, and updates to the list are resumed.
- The MoveLeftButton and MoveRightButton only support objects with the Send press to property set to Object With Focus.

## See also

How the diagnostics list works at run time

Create key buttons