Symbols manual print off

Hi I am new to Roon and run it via a Roon nucleus.

Where can I download a manual of what all the symbols mean please. I like to hold a piece of paper in my hand and look at it. (I am just old).

Here you can read up well and who wants can also print it out section by section

https://help.roonlabs.com/portal/en/kb/roon-labs-llc/faqs