diff --git a/NEWS b/NEWS
index a78978fc..99df6dfb 100644
--- a/NEWS
+++ b/NEWS
@@ -12,6 +12,9 @@ v0.4 (xxxx-xx-xx)
 - Renamed "standalone" utility to "profiler".
 - Added trace update utility, which will convert files saved in previous
   versions of tracy to be up-to-date.
+  - Optional high compression (--hc) mode is available that will increase
+    the compression level, at the cost of considerably longer compression
+    time.
 - Fix regression causing varying size of profiler window for different
   captures.
 - Added support for on-demand tracing.
diff --git a/manual/tracy.tex b/manual/tracy.tex
index a5884539..683e4a4c 100644
--- a/manual/tracy.tex
+++ b/manual/tracy.tex
@@ -625,6 +625,10 @@ old.tracy (0.3.0) -> new.tracy (0.4.0)
 
 The new file contains the same data as the old one, but in the updated internal representation. Note that to perform an upgrade, whole trace needs to be loaded to memory.
 
+\subsubsection{Archival mode}
+
+The update utility supports optional higher level of data compression, enabled by passing the \texttt{-{}-hc} parameter. It can reduce the trace size by \numrange{15}{20}\%, at a considerable time cost ($\sim17\times$~increase of compression time).
+
 \section{Analyzing captured data}
 \label{analyzingdata}