# Set up connections for the gauge (Connections tab)

## To set up tags and expressions for the gauge

1. In the Graphics Display editor, double-click the gauge to open its Properties dialog box.
2. Click the Connections tab.
3. Assign a tag or expression to this connection:

   Value

   A read connection. You can assign a tag or an expression to this connection. The application reads the value of the connection at the data source and updates the object’s display to reflect the value.

   If you assign an expression, the application calculates the value of the expression and updates the object’s display to reflect the value.

## See also

Configure the gauge appearance (General tab)

Set up values and thresholds for the gauge (Display tab)

How the gauge works at run time

Example: Using a gauge

Columns on the Connections tab of a graphic object's Properties dialog box