Hi!
I recently got an X3 Live, so all the below information is from the manuals and my own logic.
First question: Yes! Those are common to all devices of the X3 series.
Second question:
Here's a setup I think should work. Please mind that this setup will cause the guitar signal chain output to NOT have any cab simulation:
1. On the "1/4 inch outputs" page, set the Mode to "Combo front", "Combo pwramp", "Stack front", or " Stack pwramp".
2. Set Lows, Focus, and Highs as desired.
3. Set the Tone 1 to "On", Pan to full left (0%), Tone 2 to "On", Pan to full right (100%).
4. On the "Studio/Direct mix" page, set both Tone 1 and Tone 2 to "Off", Pan won't have any effect.
Hope that answers your question!