(NOT an issue) Is there any form of how-to or manual for your nodes?

[KINGLIFER]

Usually there is some type of images or something to get an idea of what the nodes do.
I was interested in CR Vignette Filter but have no idea what it does beside the obvious of the name. I have learned the hard way not to just install nodes and I can not afford at the moment to have multiple Comfy installs or damage the main setup I have. So I have to ask.

Thank you for your patience and time.

[eiddor]

The wiki should have what you're looking for, specifically the Filter Nodes section.