-# "xscreensaver-getimage" will invoke this program, depending on the
-# value of the "grabVideoFrames" setting in the ~/.xscreensaver file
-# (or in /usr/lib/X11/app-defaults/XScreenSaver).
+# The various screen savers invoke "xscreensaver-getimage", which will in
+# turn invoke this program, depending on the value of the "grabVideoFrames"
+# setting in the ~/.xscreensaver file (or in the app-defaults file, usually
+# /usr/lib/X11/app-defaults/XScreenSaver).