How to add watermark on wpress

[Mr.leg]

Hello any one can help me to add
watermark on wordpress
i have Install a plugn
but its work if i manually upload
image from my wordpres
but some site its work fine when
you post any thread its show site name
in images
How to do it automaticly water mark

 

[activebiz]

what plugin do u use?

there is a plugin available at codecanyon that works well. Just go there and type in your search.