Pfaff creative sensation pro Owner's Manual page 135

Color block sort (8)
will reduce the number of thread color changes.
without stopping between the color blocks, use the
color merge function, found in more options.
Note: Color block sort can only be enabled while on the
Thread metering/Thread tension
(9)
ActivStitch
™
9
needle thread in two ways: thread tension and
ActivStitch
™
use thread metering when possible, to get the best
result.
8
measures the fabric thickness to portion the correct
amount of thread for the selected stitch. When
using thread tension, the tension discs will keep the
correct amount on tension on the needle thread.
Yarn
®
ActivStitch
™
switch to thread tension.
change between thread metering and thread tension
thread and bobbin thread, e.g., when using specialty
thread.
Thread tension/thread metering compensation
9:5