Look it up fast

Every control on an interactive top panel — two knobs doing six jobs, and the save gesture that isn't a button.

Every jack across all three faces, the 3-amp power supply trap, and the aux input hiding in the effects loop.

The numbers that answer a question — eight blocks, three snapshots, three amps of current.

All 440 amps, cabs and effects decoded from Line 6's own list. The same library as a full Helix.

Two settings decide whether it sounds like the demo or sounds broken. Both live in a menu, and neither is a tone control.

What an impulse response is, how to load one, and why a downloaded preset can load fine and still play the wrong cabinet.

Eight positions and how to spend them. What costs double, what collapses into one, and what to drop first.

Effects pedal, four-cable, direct, bass or interface — the cabling and the cab block state for each.

Four footswitch modes on three switches, three snapshots, and which layer a change belongs on.

What a controller can actually reach, the three messages that recall a sound, and the trick that lets one preset serve several songs.

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

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

What an update changes, what it leaves alone, and the one-minute backup that means it never costs you anything.

Block, snapshot, Play view, Edit view, 4CM, Legacy — plain definitions, with why each matters here.