Main Chart

• Click and drag the mouse vertically or horizontally to select a region to zoom in to.
• When zoomed in, hold shift and drag the mouse to pan.
• Double click to go back to default zoom.

Legend (above chart)

• Click on a series name in the legend above the chart to toggle its visibility.
• The legend above the chart will show the date and values of the series when you hover the mouse over the chart.

Timeline (below chart)

• The timeline shows an overview of the plotted data.
• Click and drag either the left or the right handle to change zoom size.
• Click and drag the mouse inbetween the handles to pan horizontally.

Buttons (below timeline)

• Click "View Full Screen" to see the chart in full screen mode.
• Click "Reset to Default" to show the default data series.
• Click "Show Tabular View" to open a tab with tables of the data visible in the chart.

Most Recent Data (above chart, left of map)

• Click on one of the rows in this table to add the data series to the chart.
• If the data type of the series does not match any of the current Y axes, this will start a new blank chart.
• If the data series is already on the chart, this will refresh the series.
• Click on the USGS number link to open USGS information in a new tab.