diff --git a/doc/user/intro/Glossary.txt b/doc/user/intro/Glossary.txt
index ec16c55c1..d697bd7db 100644
--- a/doc/user/intro/Glossary.txt
+++ b/doc/user/intro/Glossary.txt
@@ -234,3 +234,5 @@ NOTE: Draft, please help rephrase/review and shorten explanations!
         possible to allow the Viewer to be collapsed to a control, thus,
         allowing a video to be sent to a dedicated monitor, e.g., to a separate
         X/-display or to a firewire. 
+anchor:Viewer Switch Board[] link:#Viewer-Switch-Board[->]Viewer Switch Board::
+       The connection between a viewer and its source???