The Graph tab sets the various parameters for the Heart Rate graph, such as colours and location of Data.
Graph Colours: Set the colour that is used for a data curve by clicking on the coloured rectangle.
Show on Graph: Select the items to be shown on the HR Graph. These can be changed when the graph is viewed, using the 'Graph Preferences'
Zero Altitude: If checked, the Altitude data is graphed from zero.
Show Lap Popups for: Sets how long the lap information windows are shown on the HR graph.
Data Line Thickness: Sets the thickness of the lines used to draw the Data Graph.
Data Smoothing: Applies a geometric smoothing to the data as it is graphed. Points to Smooth sets the number of data points that are used for the smoothing calculation.