Downloading charts from node red ui into pdf

Hello!
Please I have a mini scada that I’ve developed for my company using node red. Data are read from generators control modules and stored directly into a csv file for further processing. The csv files are then uploaded to the node red ui so they can be graphed out to best determine the daily maximum demand. Until now, am unable to download any of the daily profiles.
Please, I need help on this… Any guide, doc or video will be highly acknowledged.
Thanks!

Hi,
I use Amcharts and it have export menu.
chart

exported chart pdf
data.pdf (66.6 KB)