diff --git a/_manual/25_tempo-meter/01_tempo-and-meter.html b/_manual/25_tempo-meter/01_tempo-and-meter.html
index 500b0ea6..ad636863 100644
--- a/_manual/25_tempo-meter/01_tempo-and-meter.html
+++ b/_manual/25_tempo-meter/01_tempo-and-meter.html
@@ -7,7 +7,11 @@ menu_title: Tempo and Meter
 <p>Tempo and meter belong together. without both, there is no way to know where a beat lies in time.</p>
 
 <p>Tempo provides a musical pulse, which is divided into beats and bars by a meter.
-When you change tempo or move an audio-locked meter, all objects on the timeline that are glued to bars and beats (locations, regions) will move in sympathy.</p>
+  When you change tempo or move an audio-locked meter, all objects on the timeline that are glued to bars and beats (locations, regions) will move in sympathy.
+</p>
+<p class="note">When performing meter or tempo operations, it is advised that you show the BBT ruler (available by right-clicking an existing marker or ruler name),
+  and ensure that the constraint modifier is set (in Preferences->User Interaction) so that no other modifiers share the key combination for "Constrain drags using : " e.g. control-shift.
+</p>
 
 <h3>Tempo</h3>
 <p>Tempo can be adjusted in several ways: