diff --git a/Tools/TimePlot.hs b/Tools/TimePlot.hs
--- a/Tools/TimePlot.hs
+++ b/Tools/TimePlot.hs
@@ -502,6 +502,8 @@
   "  'duration[C] XXXX' - same as 'duration', but of a track's name we only take the part before character C.",
   "     For example, if you have processes named 'MACHINE-PID' (i.e. UNIT027-8532) say 'begin something' / ",
   "     'end something' and you're interested in the properties of per-machine durations, use duration[-].",
+  "     An interesting combination is, for example, duration[-] cumsum - you'll see total durations of the",
+  "     something for all pids on a machine, for each machine.",
   "  'hist N' is for histograms: a histogram is drawn with granularity of N time units, where",
   "     the bin corresponding to [t..t+N) has value 'what was the maximal number of active events",
   "     in that interval'.",
@@ -519,6 +521,8 @@
   "     into bins min..v1, v1..v2, .., v2..max in time bins of size N",
   "  'lines' - a simple line plot of numeric values",
   "  'dots'  - a simple dot plot of numeric values",
+  "  'sum N' - a line plot of the sums of numeric values in time bins of size N",
+  "  'cumsum' - a line plot of the cumulative sums of numeric values seen so far",
   "N is measured in units or in seconds."
   ]
 
diff --git a/timeplot.cabal b/timeplot.cabal
--- a/timeplot.cabal
+++ b/timeplot.cabal
@@ -1,5 +1,5 @@
 Name: timeplot
-Version: 0.2.3
+Version: 0.2.4
 License: BSD3
 License-file: LICENSE
 Copyright: Eugene Kirpichov, 2009