diff --git a/manual/tracy.tex b/manual/tracy.tex
index 2d7d5882..550b3b7e 100644
--- a/manual/tracy.tex
+++ b/manual/tracy.tex
@@ -2594,7 +2594,7 @@ Hovering the \faMousePointer{} mouse pointer over the timeline view will display
 
 The timeline view may be scrolled both vertically and horizontally by dragging the \RMB{} right mouse button. Note that only the zones, locks and plots scroll vertically, while the time scale and frame sets always stay on the top.
 
-You can zoom in and out the timeline view by using the \Scroll{}~mouse wheel. You can select a range to which you want to zoom-in by dragging the \MMB{} middle mouse button. Dragging the \MMB{} middle mouse button while the \keys{\ctrl} key is pressed will zoom-out.
+You can zoom in and out the timeline view by using the \Scroll{}~mouse wheel. Pressing the \keys{\ctrl} key will make zooming more precise, while pressing the \keys{\shift} key will make it faster. You can select a range to which you want to zoom-in by dragging the \MMB{} middle mouse button. Dragging the \MMB{} middle mouse button while the \keys{\ctrl} key is pressed will zoom-out.
 
 \subsection{Time ranges}
 \label{timeranges}