Any suggestions to watermarking a staging site
 

Hi,

I have a WP staging site
dev.example.com
which is a copy of
www.example.com

And I'm worried about colleagues (and myself to be honest) getting confused as to which site is which.

Is there a plugin or a strategy that will generate a big reg STAGING banner/watermark on my staging site but that won't appear on the live site - even when I copy the entire database and file structure across (apart from the wp-config.php)?

Cheers,
Paz.