A newer version of this content is available on ReWorkflow ReSource.
People regularly wish to expand all rows of a Slate report, typically because emailed PDF versions are non-interactive, and many C-level types want all reports emailed to them.
Place the following in the source code of a static content block to expand all rows of a report by default. This will also apply to PDF's and emailed reports.
<style type="text/css"> table.table>tbody>tr.hidden { display: table-row !important; } </style>  
The non-breaking space at the end helps prevent the HTML tidier from tidying your code down to nothing.