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Tap the menu icon at the top of the graph and then enable or disable the sensors, statistics, and events you wish to show or hide on the graph. Tap the menu icon again when you are done.
Viewing the graph of a full data file or adding more sensors to the view of a graph (through the sensor selector) may occasionally draw a blank graph.
Tap the Sharing icon at the top of the graph, select CSV or TEXT to view the data points, or select XLSX and then tap Quick Look.
Tap at the top of the graph. If you have activated the crosshair tool while zoomed out on a graph, it is possible that this button will not restore the graph to its original scale.