Excluding image from gallery

Exactly as you said, but you have to use the attachment ID of your photo.

where can i find the id ?

You can see it in the URL when mousing over the Edit link in the Media Library. I am not sure if there’s a better/easier way.

ok tnx it works now ??
but i have a new problem…
i have several gallerys and in every gallery i dont want to display the first photo. how can i do that ?

https://stackoverflow.com/questions/4337999/wordpress-exclude-the-post-thumbnail-from-gallery-shortcode this helped me !