When using a green screen at your location, the GoPhoto - CMS allows you to set up a back- and foreground for your photos.
''Adding a foreground is optional, you can also leave this open''
To set your green screen settings follow these steps:
Navigate to 'Photo settings' and select 'Green screen'
Select the aspect ratio of the photos you will upload
Click 'Add another green screen' and click the 'pencil' icon
Upload a background and a foreground
Upload a test photo or select 'Use last photo' to preview the result
Drag your photo into the right position and scale/rotate if necessary
Click 'Save' and select the composition to activate it
To get an impression of this workflow view the video below