you need to edit first css file first
file:templates/jf_texturia/css/template.css
and add overflow:hidden to #jf-slideshow


then make jf_slideshow.png smaller

Thank you for the quick answer!

Just one more question about the slideshow.

Now I got the slidshow smaller, but I would like to have the slideshow in centre of my webpage.
Is there an magic command for that too?

Sorry, I am a newbee

pls add following css code to
templates/jf_texturia/css/template.css
.mod_btslideshow{
margin:0 auto;
}