Dear Sushil, thanks for your prompt reply.
I’ve seen the tutorial and it’s ok.
Right now if you visit the website http://www.test.marionart.it you see two different slideshow, the first one has been created using SiteOrigin slide show and it fits perfectly the full width, while instead the second one has been created using widgetkit slideshow but it doesn’t fit perfectly, why this?
many thanks for your support. maria