[Theme: Brightpage] Please help with the slider image – how to expand the photo

I like Bright Page theme because it just fits my site. However, the images that appear in the slideshow is not centered and the images do not occupy the entire space. How do I set it to 100%.

I have read similar post with the same issue and a member suggested to insert this code:
#menu {
position: relative;
width: 100%;
z-index: 100;
}

I have already inserted the above code but there is no effect. Check my site here:

Fresh Blogging Tips

Thank you

https://www.ads-software.com/extend/themes/brightpage/