What does y scaling mean in svm-scale

What does y scaling mean in svm-scale

Does it mean to scale the value of the target(class),which is the first
column of every instance?
Regards,
amber@cent64 libsvm-3.17]$ svm-scale Usage: svm-scale [options]
data_filename options: -l lower : x scaling lower limit (default -1) -u
upper : x scaling upper limit (default +1) -y y_lower y_upper : y scaling
limits (default: no y scaling) -s save_filename : save scaling parameters
to save_filename -r restore_filename : restore scaling parameters from
restore_filename