Add the ability to configure graphs with an optional JSON blob at the beginning of the file. This blob could create a secondary y-axis (like this interesting chart), or other ways of configuring individual graphs.
Options should include the ability to assign data columns to a primary or secondary y-axis, and to specify the ranges of those axes. Potentially, format the appearance of the lines themselves.
Add the ability to configure graphs with an optional JSON blob at the beginning of the file. This blob could create a secondary y-axis (like this interesting chart), or other ways of configuring individual graphs.