Philips V24CT User's Reference Manual page 97

The alarm limits are represented by a rectangle, filled with the
parameter's color at low intensity. When a measurement exceeds an
alarm limit, it is clearly visible against the screen's black background. The
limits themselves are displayed on the right side of the trend display, next
to their corresponding boundaries.
The alarm-limit values are always displayed within the rectangle defined
by alarm limits, if they fit.
Note—
do not have alarm limits associated with them. In this case, no rectangle
is displayed for the alarm range. Instead, the default range scales are
displayed with low intensity on the left side of the trend display, to
distinguish them from alarm limits.
Trend data is only displayed for those vital signs that are positioned in the
left column of the numeric display.
Viewing Trend
Three trend values are displayed for invasive pressure; systolic, diastolic,
Data for and mean pressure. These three trends are displayed together as shown in
Invasive Blood
the diagram below.
Pressure
The alarm limits can apply to any of the three pressures, depending on
how they are configured. The alarm limits are therefore prefixed with a
letter, which identifies the pressure to which they are configured. These
letters are:
Some trends, such as vital signs that are received through VueLink,
Display of Trend Data for Invasive Blood Pressure - Example
S
D
M
Displaying Split Screen Trends
Systolic pressure
Diastolic pressure
Mean pressure
Setting up your Monitor 3-23