No Data Message formatting option is available in all the widgets.
No Data Message appears if

• The inadequate or wrong type of variables are selected to plot a widget
• Incoming data to the chart is empty (Wrong filter configuration)

By default, the formatting options for No Data Message are not visible. Turn the toggle button ON () to format the No Data Message.

The message that appears on the widget canvas is 'No Data Found'.

Now,

• Change the text of the message. In the chart below, we choose the message 'Data Not Available'.
• Change the message font type, font size, and font color.
• Make the message bold, italic, and underline it.

The resultant widget is shown below.