-With the option:--all option, *all* the tracing sessions, as listed in
-the output of `lttng list` (see man:lttng-list(1)), are cleared.
+Without any option::
+ The current tracing session.
++
+See man:lttng-concepts(7) to learn more about the current tracing
+session.
+
+With the 'SESSION' argument::
+ The tracing session named 'SESSION'.
+
+With the option:--all option::
+ *All* the tracing sessions of the connected session daemon for your
+ Unix user, or for all users if your Unix user is `root`, as listed
+ in the output of `lttng list` (see man:lttng-list(1)).
++
+See the ``Session daemon connection'' section of man:lttng(1) to learn
+how a user application connects to a session daemon.