Philips V24CT User's Reference Manual page 48

Operating Levels
There are two reasons for changing the selection in the Task Windows:
you will either want to move to the next Task Window, or make an
adjustment to a setting.
1-26 The CMS and V24 and V26 Patient Monitors
1. To move to the next Task Window, press the softkey for the
function you require, for example
into the Filter/Mon/Diag Task Window where you can make any
necessary adjustments.
2. To make an adjustment, change the selection by pressing the
softkey for that window again, until the adjustment or change you
want is active, or use the arrow keys if they are illuminated.
. This gets you
Filter/Mon/Diag
Pts
Refernce