<p>
The <a href="popupMenu.html">Popup Menus</a> are opened by clicking
with the right mouse button in the alignment display area or on a
- sequence label in the alignment window.
+ sequence label in the alignment window.<br />
+ <em><strong>Mac Users:</strong> pressing CTRL whilst clicking
+ the mouse/track pad is the same as a right-click. See your
+ system's settings to configure your track-pad's corners to
+ generate right-clicks.</em>
</p>
<p>
The <a href="alwannotationpanel.html">Annotations Menu</a> is opened