diff --git a/manual/tracy.tex b/manual/tracy.tex
index 3cdb08d4..33bdf5c7 100644
--- a/manual/tracy.tex
+++ b/manual/tracy.tex
@@ -996,7 +996,7 @@ The timeline view may be focused on the frames, by clicking or dragging the \LMB
 
 \subsubsection{Timeline view}
 
-The timeline is the most important element of the profiler UI. All the captured data is displayed there, laid out on the horizontal axis, according to the flow of time. The view is split into three parts: the time scale, the frame sets and the combined zones, locks and plots display.
+The timeline is the most important element of the profiler UI. All the captured data is displayed there, laid out on the horizontal axis, according to the flow of time. Where there was no profiling performed, the timeline is dimmed out. The view is split into three parts: the time scale, the frame sets and the combined zones, locks and plots display.
 
 \subparagraph{Collapsed items}
 \label{collapseditems}