You have two styles of image header to choose between: 'Full' or 'Capped' width.
To change between the styles:
- Login to WordPress by adding ‘/wp-admin/’ to the end of your website URL, and entering your login details
- From the Dashboard, go to the Siteloft tab in the sidebar
- Click the Projects tab
- Choose Capped width or Full width in the Choose the single project page header type section
- Click Save settings