diff --git a/config/example-extras.cfg b/config/example-extras.cfg
index 32221e2ca..9b9806263 100644
--- a/config/example-extras.cfg
+++ b/config/example-extras.cfg
@@ -296,11 +296,11 @@
 #set_position_x:
 #set_position_y:
 #set_position_z:
-#   If specified, the position to set the printer to (in mm, relative
-#   to the coordinate system specified in the config file) prior to
-#   running the above g-code commands. Setting this may be useful if
-#   an axis must move prior to invoking the normal G28 mechanism for
-#   that axis. The default is to not force a position for the axis.
+#   If specified, the printer will assume the axis is at the specified
+#   position prior to running the above g-code commands. Setting this
+#   disables homing checks for that axis. This may be useful if the
+#   head must move prior to invoking the normal G28 mechanism for an
+#   axis. The default is to not force a position for an axis.
 
 
 # A virtual sdcard may be useful if the host machine is not fast