diff --git a/NEWS b/NEWS
index 33ba2404..ad16c099 100644
--- a/NEWS
+++ b/NEWS
@@ -68,6 +68,8 @@ v0.4 (xxxx-xx-xx)
   - Only one frame set can be active at once. The selected one is used for
     the frame navigation graph, frame navigation buttons and drawing frame
     separators.
+  - The active frame set will be highlighted, and the rest will be dimmed
+    out.
   - Frames can now also be discontinuous.
 - Frames and zones too small to be displayed will be marked with a zig-zag
   pattern.
diff --git a/manual/tracy.tex b/manual/tracy.tex
index 45894376..b99dc82b 100644
--- a/manual/tracy.tex
+++ b/manual/tracy.tex
@@ -900,7 +900,7 @@ The leftmost value on the scale represents the time at which the timeline starts
 
 \paragraph{Frame sets}
 
-Frames from each frame set are displayed directly underneath the time scale. Each frame set occupies a separate row.
+Frames from each frame set are displayed directly underneath the time scale. Each frame set occupies a separate row. The currently selected frame set is highlighted with bright colors, with the rest dimmed out.
 
 \begin{figure}[h]
 \centering\begin{tikzpicture}