WHENNOHEADER

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Replaces the entire subpanel header with the specified text when rows are empty and the subpanel is collapsed.

WHENNOHEADER="text"
If there is no data returned in a subpanel, the subpanel is automatically collapsed and the header displays the text No data. You can override the header with alternative text, up to a maximum of 64 characters.

Example

WHENNOHEADER=No data is available because the task has ended