General settings

Startup

With Minimise to system tray on close, the close button hides the window and monitoring carries on; double-click the tray icon to bring it back.

Ping settings

Ping interval

Default 1 second. Lengthen it when you watch many hosts, or over a link where traffic costs money.

Timeout

How long to wait before a ping counts as lost; default 1 second. Raise it if a distant host shows losses it does not deserve.

Both apply to every host. A host can have its own latency thresholds and probes, set in Edit Host.

Data

Keep history for 24 hours, 7 days (the default), 30 days or forever. A week is enough to see a weekly pattern; keep more when you are building a case, and the database grows to match.