Items can be displayed in a graph as lines, points or bars. The plotting method 'stacked area' is now added. Values are stacked on top of each other, so that the total of all values can also be seen. This is useful, for example, with a distribution in percentages, in which case the total is 100%. The graph below shows the stem length between the consecutive leaves in a young plant. The total of all pieces of stem is the total length of the plant. You see the plant grow, as it were.