Click the 9 square button at the top right of the screen.
Click on the Smart PBX app.
Click Devices on the left.
Click the Edit icon
Click Config File button.
A new tab will open showing the full configuration file for that device.
Note: If a '404/File not found' error is returned close the tab, and then click Save Changes for that device. Click Edit again and the Config File should then be displayed.