Genome Browser graph-based tracks may be configured in a variety of ways to highlight different aspects of the displayed information. The following information explains each of the available configuration options.

• Type of graph: The default "Bar" setting depicts the graph data using color-filled bars. To view the data as a series of points or lines, select the "Points" setting.
• y = 0.0 line: Select the "ON" setting to display a line marking the 0.0 position on the graph (default is "OFF").
• Track height: To change the default display height of the graph in pixels, type in a value from within the indicated range.
• Vertical viewing range: The min and max values specify the vertical portion of the graph that is displayed (default range is 30-70). These numbers can be used to set data threshold indicators. For example, to display only those GC values greater than 50 percent, set the min value to "50".
• Data view scaling: The default "Use vertical viewing range setting" option displays the data using the parameters specified in the Vertical viewing range setting. To configure the graph to automatically scale to a range defined by the minimum and maximum data points in the current view, select the "Auto-scale to data view" option.
• Windowing function: When a view is too large to show individual data values, the values must be combined to produce a plot point. This option specifies the combining function to be used (default is "Mean"):
  • "Maximim" - the maximum value of all the points to be combined
  • "Mean" - the mean
  • "Minimum" - the minimum of all the points to be combined
• Smoothing window: When set to a numerical value, this option determines the size, in pixels, of a smoothing window to be passed over the plot to smooth the edges of the bars or lines. This is equivalent to a trend line calculation on the graph. The default setting is "OFF".
• Draw indicator line at y = : When set to "ON", the track displays an arbitrary line on the graph at the specified numerical value (defaults are "0" and "OFF"). This line can be used to mark a significant threshold on the graph.

When you have finished making your configuration changes, click the Submit button to return to the annotation track display page.