We have 3 type of time selection widgets. One is base on slider bar, second one is select last x time interval, and third one is base on selection by date. The code are located in src/web/hicc/jsp, time_slider.jsp, time_range.jsp and time_frame.jsp respectively. I currently don't have a widget for changing y-axis, but I think it's better to build inside the widget properties. You might want to look at src/hicc/descriptors/system_metrics.descriptor on how to add extra y-axis parameter to the chart.jsp. I have a system_metrics.descriptor file which works with HBase data source, if you are interested, I can upload it here.