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Where can I find basic instruction about how to use the circuit drawing capability and the meaning of symbols (for example, what does nB mean as in V(R1.nB)?

There is a page https://www.circuitlab.com/docs/ that has a bunch of good beginners stuff and gives an idea what circuit lab can do. I don't know if it covers the V(R1.nB). But quickly, it is V for voltage, or it might be I for current and potentiality other things. Then inside the parentheses it the CL name of the component, then the CL given name of the nodes of that component. so a resistor will have a node nA and nB. Transistors will have 3 nodes. I think its best to give nodes names with the 'node name' tool then I can call it what it is to me

Hope this helped

Thanks Garrett. That helps. I'm starting to get the hang of it.

John