REALTIME CHART PAGE A chart widget is a Subdrawing that uses a chart template drawing rtchart_scroll.g. Each chart instance is configured dynamically at run-time using provided Metadata. The Description resource of each chart widget is used as a key to find corresponding metadata record. The metadata include information for yaxes and plots, such as axis label, low/high ranges, plot color, tag, linked axis, etc. Toolbar buttons of each chart allow to scroll the chart data, zoom the chart, change X axis time span, etc.