Enter the access token. It lives in token inside the server's data directory (or FJ_HUB_TOKEN). It is kept only in this tab.
Hub logs live in the container's data directory, capped at 100 MB (10 files of 10 MB). Debug and Info are the only levels you can pick; Warn and Error are always logged and cannot be turned off.
Experiment live: Apply changes the running session at once, no reload. When this is off, the Speed mode rules exactly as before. PNG is lossless, so it ignores quality; Delta colour ignores bits (a per-patch palette would seam); grey deeper than 8 bits forces PNG. The capture from Chrome stays JPEG — these controls govern what the hub serves, except Capture quality, which sets the Chrome screencast JPEG quality itself (the screencast restarts on Apply). Uncheck HQ stills for a pure high-speed stream — no sharp still and no idle tier — the way to test whether HS+HQ helps or the stills cost anything. Idle and Delta have their own off switches below: Idle off keeps the High quality still only, Delta off sends full frames only.
Delta patches only: when the picture is served as JPEG, the hub re-decodes the served bytes for its diff base, so the chain tracks the picture you actually hold.