What does it do?
The container settings button brings up the settings that relate to the container. We can see in the screenshot above that there are 3 widgets in the container.
More could be added if required. By default the contents of those widgets will display one above the other in the order they are shown and they will take up as much space as is needed.
We can use the 'Container Settings' button to change that.
The options we have are:
* change the display of the widgets to display as a tabbed section.
* change the height of the box so the widgets take up a fixed amount of space.