Region Coordinate Systems
overview     see also 

The graph, figure, and data regions each have their own coordinate systems for placing graph elements. Graph and figure region coordinate systems range from 0.0 to 1.0 in the x- and y-directions. A data region's coordinate system is determined by the scales that border it. In most cases it is easier to position annotation items and regions by dragging them than by specifying coordinates.

Graph units are used to place:

·    One or more figure regions on a page

·    Annotation items for the whole page, rather than for one graph

Figure units are used to place:

·    The data region

·    Annotation items such as titles and footnotes

·    Scale elements such as axis labels and tick labels

Data units are used to place:

·    Annotation items such as text, lines, markers, and polygons

·    Scale elements such as tick lines and reference lines