Saving a Chart
When you have created a chart that you would like to keep hold of in the Data Analysis feature. You can select "Save" in the upper-right of the screen in order to save it to come back to for later. Note that this will save the chart configuration, so when you load it again the data will be refreshed according to the chart configuration.
Loading a Chart
You can load saved charts in the Data Analysis feature by selecting "Load" in the upper-right of the screen.