diff --git a/website/api/dependencyparser.jade b/website/api/dependencyparser.jade
index ca56d6816..e557ef9da 100644
--- a/website/api/dependencyparser.jade
+++ b/website/api/dependencyparser.jade
@@ -2,4 +2,5 @@
 
 include ../_includes/_mixins
 
+//- This class inherits from Pipe, so this page uses the template in pipe.jade.
 !=partial("pipe", { subclass: "DependencyParser", short: "parser", pipeline_id: "parser" })
diff --git a/website/api/entityrecognizer.jade b/website/api/entityrecognizer.jade
index aff33bde7..a8b68e453 100644
--- a/website/api/entityrecognizer.jade
+++ b/website/api/entityrecognizer.jade
@@ -2,4 +2,5 @@
 
 include ../_includes/_mixins
 
+//- This class inherits from Pipe, so this page uses the template in pipe.jade.
 !=partial("pipe", { subclass: "EntityRecognizer", short: "ner", pipeline_id: "ner" })
diff --git a/website/api/tagger.jade b/website/api/tagger.jade
index 4c8ce916f..7a7e9214f 100644
--- a/website/api/tagger.jade
+++ b/website/api/tagger.jade
@@ -2,4 +2,5 @@
 
 include ../_includes/_mixins
 
+//- This class inherits from Pipe, so this page uses the template in pipe.jade.
 !=partial("pipe", { subclass: "Tagger", pipeline_id: "tagger" })
diff --git a/website/api/tensorizer.jade b/website/api/tensorizer.jade
index b54e20514..cc79f36e3 100644
--- a/website/api/tensorizer.jade
+++ b/website/api/tensorizer.jade
@@ -2,4 +2,5 @@
 
 include ../_includes/_mixins
 
+//- This class inherits from Pipe, so this page uses the template in pipe.jade.
 !=partial("pipe", { subclass: "Tensorizer", pipeline_id: "tensorizer" })
diff --git a/website/api/textcategorizer.jade b/website/api/textcategorizer.jade
index 2d550f699..a9684b15d 100644
--- a/website/api/textcategorizer.jade
+++ b/website/api/textcategorizer.jade
@@ -16,4 +16,5 @@ p
     |  before a logistic activation is applied elementwise. The value of each
     |  output neuron is the probability that some class is present.
 
+//- This class inherits from Pipe, so this page uses the template in pipe.jade.
 !=partial("pipe", { subclass: "TextCategorizer", short: "textcat", pipeline_id: "textcat" })