Yealink SIP-T54S Administrator's Manual page 216

Administrator's Guide for SIP-T2 Series/T19(P) E2/T4 Series/T5 Series/CP860/CP920 IP Phones
When the transparency is set to 0%:
Procedure
Transparency can be configured using the following methods.
Central Provisioning
(Configuration File)
Web User Interface
Phone User Interface
Details of the Configuration Parameter:
phone_setting.idle_dsskey_and_title.transparency
Description:
Configures the transparency of the DSS key labels and status bar on the idle screen for the
IP phone.
If it is set to 0%, the DSS key labels and status bar are non-transparent.
Example:
190
<y0000000000xx>.cfg
Parameter
Configure the transparency of the
LCD screen.
Parameter:
phone_setting.idle_dsskey_and_title
.transparency
Configure the transparency of the
LCD screen.
Navigate to:
http://<phoneIPAddress>/servlet?
p=settings-preference&q=load
Configure the transparency of the
LCD screen.
Permitted Values
0%, 20%, 40%,
60%, 80% or 100%
Default
100%