# Set up connections for the bar graph (Connections tab)

## To set up tags and expressions for the bar graph

1. In the Graphics Display editor, double-click the bar graph 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 changes the fill level on the bar graph 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

Create bar graphs

Configure the bar graph (General tab)

How the bar graph works at run time

Example: Using a bar graph

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