Hi Michael,
Thank you for your purchase.

It should be working. I suppose that there is some css rule with higher priority from theme or another plugin. Can you please send me a link of the page where you are using this table so I can take a look?

Best regards.

Hi Michael,

Like I suppose there are some css from your theme that overwrite your css and css from plugin.(attachment)

Just add this code in Custom wpDataTables CSS under the "Custom JS AND CSS" in main settings of wpdatatables.

.wpdt-c .wpDataTablesWrapper table.wpDataTable thead th{text-transform: lowercase !important;}

This will be affected on all tables, but if you want just for specific one then insert this code on page where is that table between the style tag.(<style>Code here</style>)

<style>
.wpdt-c .wpDataTablesWrapper table.wpDataTable thead th{text-transform: lowercase !important;}
</style>

Best regards.

Hi Michael,

You are welcome.  Glad that we help you to solve the issue.

If you have any more issues or questions feel free to open a new ticket, we will gladly help.

If you are satisfied with our plugin or support, we'd greatly appreciate it if you could take a minute and leave a Review on CodeCanyon on this link. Thanks! 

Best regards.