Look it up fast

Every control on an interactive top panel — twelve capacitive footswitches, the joystick, and the toe switch nobody knows is there.

Every jack on an interactive rear panel, including the mono rule that makes rigs sound thin and the ground lift that fixes hum.

The numbers that answer a question, with a source on each line and a note wherever the bare figure misleads.

All 440 amps, cabs and effects decoded from Line 6's own list. “Brit 2203” is a JCM-800; “Cali Rectifire” is a Dual Rectifier.

Why it stops you adding a block when the meter looks half empty — the hard caps, and the six changes that actually buy back space.

Pick what you're plugging into and get the cabling, the cab block state, and the thing that goes wrong.

Preset, snapshot or stomp — which layer a change belongs on, and why the wrong one leaves a gap in your sound.

Straight answers to the things people actually ask, in a sentence or two each, with a link to the detail.

Symptom, cause, fix — including the several entries that turn out to be documented behaviour rather than faults.

Block, path, snapshot, scribble strip, L6 LINK, Legacy — plain definitions, with why each matters here.