The site looks different in the Admin Panel and on the web, since the Admin Panel tools occupy some space on your screen. To see what your photo website looks to your visitors, go to the page that you want to preview and click the “Fullscreen” button on the top grey panel.
A fullscreen webpage version will open in a new browser tab. You can also preview your website at any time with just 1 click – hit the Preview icon in the top right corner of the Admin Panel interface. It’s right next to your profile name.