149MD Evolution – Dialog 4223 Professional
Installing Your Extension
Adjusting the Screen Angle
Your extension’s screen is also adjustable, allowing you to choose 
the best possible viewing angle. 
To adjust the screen angle, simply push or pull the screen as 
illustrated below.
Installing Your Extension’s Label
Your extension also comes with a label that identifies each fixed 
function key’s use. You may also indicate what functions have 
been programmed on your extension’s various line keys (see the 
“Programming Your Extension” section.)
This label is protected by a plastic cover.
To insert or remove the label, lift the protective cover as illustrated 
below.
Note: If you need a new label, contact your system 
administrator.