contentView is the view which occupies the background. It can be an FPV or Map or any other content. By default it shows the live video from the main camera.
PreviewView is the view which is shown as a small rectangle on the bottom right side of the screen. It usually shows either the video feed from the camera or the map widget.
leadingView is the view managed by DUXLeadingViewController It is the collection which sits vertically on the leading side of the UI and is prepopulated to be similar to DJI Go with actions to take off, land and go home.
statusView is the view managed by DUXStatusBarViewController. It is the collection which usually sits on top of the UI and is prepopulated to be similar to DJI Go.
dockView is the view manager by DUXDockViewController It is the collection which sits on the bottom of the UI and is prepopulated to be similar to DJI Go
trailingView is the view managed by DUXTrailingViewController It is the collection which sits vertically on the trailing side of the UI and is prepopulated to be similar to DJI Go with actions related to the camera like changing its mode and capturing photos and video.