+.TP
+.B when
+When to process each configuration file. The value used here will
+be applied for each configuration file. It is possibile to override
+this "when" in each each configuration file, see also section
+"Scheduling" in backup.d(5).
+
+For example:
+
+ when = sundays at 02:00
+ when = 30th at 22
+ when = 30 at 22:00
+ when = everyday at 01 <-- the default
+ when = Tuesday at 05:00
+
+These values for 'when' are equivalent:
+
+ when = tuesday at 05:30
+ when = TUESDAYS at 05
+
+These values for 'when' are invalid:
+
+ when = tuesday at 2am
+ when = tuesday at 2
+ when = tues at 02
+
+.TP
+.B vservers
+If you are using Linux-Vservers (http://linux-vserver.org), there are some
+special capabilities that different handlers have to make vserver backups easier.
+See the example configuration files for each handler to configure the vserver specific
+variables.
+