concept of an @dfn{active region} exists. The region is active when the
corresponding mark is active. Note that only one active region at a
time can exist -- i.e. only one buffer's region is active at a time.
concept of an @dfn{active region} exists. The region is active when the
corresponding mark is active. Note that only one active region at a
time can exist -- i.e. only one buffer's region is active at a time.