FOCUS Enhancements 3.2 - Manual (Page 104)

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Update Interval
Allows you to schedule HTTP updates every 30 minutes, 1, 2, 4 or
12 hours, 1 day or at a fixed time.
Fixed Update Time
Allows you to set an actual fixed time (on an hourly basis) for an
HTTP update (Example: 14:00). In order for this feature to be
accessible, you must have the Update Interval set to “Use fixed
time”.
HTTP Update Now Button
By pressing this button in Webview will initiate the Firefly to
immediately download any new media, playlists, schedules and or
updates.