Containers can be used to group a number of layers and control them simultaneously. Furthermore, containers can be used for scrolling or paging interactions.
The x and y coordinates for a layer are based on the assumption that the origin is at the top left corner. However, the coordinates for layers within a container are based on the assumption that the origin is at the top left corner of the container.
Enabling the clip sublayer in the property panel allows clipping within the boundaries of the parameter.