Add Area
This button is used for adding a new area to the data tree.
The new area is always added one level beneath the one you highlight/select by clicking on it.
Example: If 'Areas' is highlighted, clicking the button will generate a new area on the same level as 'Europa'. If 'Schweiz is highlighted, the new area will be generated on the level of 'Tessin'.
In the setting General the area subtype can be chosen, as well as the name for the new area.
Area Subtype is chosen from a dropdown menu. It gives information about the hierachical importance of the area (A1: continent/A3: country).
