In diagram windows the calculated graphs are displayed.
There can by any number of diagram windows. Only one has the red border, it is the active diagram where new graphs are been added.
The value range for new graphs can be set in diagram properties dialog, which can be reached by double clicking the diagram.
When a graph is selected by clicking on its name in the legend, the graph values can be read out with the cursor, displayed in the status bar. Double clicking on the legend entry opens the graph properties dialog.
With the right mouse button the context menu is show for the window properties.
These windows can be entered, deleted, moved and resized.
When a diagram window is selected when print or print preview is selected, only this window is printed.