Viewing a graph
Moving the mouse over the graph moves the cross-hairs, and displays the X and Y co-ordinates of the current point.
When the mouse is positioned exactly over a line in the graph, the legend for that line is displayed.
3. Zooming in
To zoom into an area of the graph, use your mouse to select the area you want to enlarge starting at the top left corner, and moving to the bottom right corner while keeping the left mouse button down. When you release the mouse button, the selected area will be enlarged in the graph.
4. Zooming out
To zoom out, select any block starting from the bottom right corner and ending at the top left corner. When the mouse button is released, the graph will be shown at its original size.
The visible area of the chart can be moved by dragging it with the right mouse button held down.