The PPA Charts feature allows astronomers to quickly and dynamically plot various metadata/header values from various pages on the portal. Currently available header keywords (for use as X or Y axis) include: Photometric Depth and Zeropoint, Seeing, RA, DEC, Detector gain, Airmass, Exposure time, and Observation Date (including MJD-OBS). PPA Charts is based on the Highcharts  and AngularJS  libraries, and can easily be extended with additional metadata header fields based on user feedback and requests. From within the PPA Charts interface, users can zoom in to a certain region within a currently displayed plot by drawing a box using their mouse; they can also reset back to the default zoom level.
Exporting plots: Users can easily print a chart or export it in various formats including PNG, JPEG, PDF, SVG vector for use publications, etc.; they can even add a custom title to the plot before they export it. Users can also export the metadata values associated with a plot as a CSV file.
Bookmarking plots: Each plot can also be bookmarked for future reference in cases where, for example, a user is attempting to inspect a certain parameter set over time.
PPA Chart Demo Video