This was perfect as I have charts preloaded with many tags on them using the solution by @pturmel Setting Default Pens in Easy Chart when Opening a window - #2 by pturmel
Since I have so many pens on the charts, I needed a way for the user to quickly unselect them all.
The only change I made for the script to work for me since I’m preloading the chart with Tag History pens is that I used .tagPens instead of .pens.
Thank you!