Sierra Video G.R.I.P. V3.1.0 - Manual (Page 48)

Sierra Video Systems
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Locks
You may want to “Lock” a destination in order to prevent someone on the system from
changing the source from another location.
By selecting a Destination in the Status Window and clicking on the “Lock” button, an
individual selection will be locked which will be signified by a flashing lock (unlock) button
and a Red and Black “L” displayed in the Status window. The “Lock” button changes to
“Unlock”. To unlock a Destination, select the “Locked” Destination and press the “Unlock”
button. The button will change back to normal.