Originally Posted by: bcraig4J

I have a old model of fractal axe fx 2 for my Mac and now yahama thr 2 for the living room[/quote]

In that case I think it's probably more practical to search for tutorials or info on how to set the amps you have than general info on how amps work. For example:

Yamaha THR

https://www.youtube.com/watch?v=rOsWOomKqcw

Fractal Axe Fx2

https://www.youtube.com/watch?v=bs9u8YShk3o

[quote=bcraig4J]that the master voumle and gain knobs work together to shape your primary tone

the eq are the your secondary for tone shaping

I am going to watch those videos you guys left and get back

Yes, in general. The order is:

Gain is for amount of overdrive or distortion.

EQ is for timbre shaping, bass, mids & treble.

Master volume is at the end of the chain, it determines how long the overall sound will be.

But all those will interact depending on your guitar, your playing skills & the overall volume.