Uniden BCD325P2 Owner's Manual page 30

Trunking Display Mode 3 (Hold Mode)
The display has indicators that show the scanner's current operating status. The
display information helps you understand how your scanner operates.
The first line shows the system, site,
or range name while scanning.
This shows the scanning direction.
These show the one's place of Quick
Key for system or site.
These show Quick Key for channel
groups.
This shows the ten's place of Quick
Keys for system or site.
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