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diff --git a/manual/advanced_topics/viewports/grayscale-conditional.tex b/manual/advanced_topics/viewports/grayscale-conditional.tex
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+++ b/manual/advanced_topics/viewports/grayscale-conditional.tex
@@ -0,0 +1,15 @@
+\begin{example}
+    %?C<%Vda|%Vdb>
+    %Vl|a|10|10|50|50|-|-|-|
+    %Cl|0|0|50|50|
+    %C
+    %Vl|a|0|70|70|14|1|-|-|
+    %s%acThere you have it: Album art.
+    %Vl|b|20|14|50|14|1|2|-|
+    %t1%acWarning:;%t.1 
+    %Vl|b|20|30|50|50|1|-|-|
+    %sNo album art found
+    %scheck your filenames.
+\end{example}
+This example checks for album art. Album art will be displayed in viewport 'a', if
+it is found. Otherwise a flashing warning will be displayed in viewport 'b'.