Well at default #gkHeader1 is 67% of the width of whole website. If you don't have anything next to slideshow module ( e.g gkHeader2 ) then you can use override.css with following css code. Make sure to enable css override from template settings > advanced settings.
- Code: Select all
#gkHeader1 { width: 100%!important; }
Then go into image show module settings > interface and increase width.
See you around...