By default, graph visualizations display bars, but you can easily display the bars as lines and vice versa.
Both display types are shown in the following example.
To select the display type
Right-click the dimension label at the bottom of the graph and click Display > Draw lines or Display > Draw bars. An X appears to the left of the active display mode.
Gradient Overlay on a Graph
You can right-click and select a Gradient Overlay from the menu to better view graph elements.