diff --git a/GUI/Model/CatDevice/BackgroundItemCatalog.h b/GUI/Model/CatDevice/BackgroundItemCatalog.h
index 6e4d54d95d33b4373831e32be6fa64a687b0074c..4a7e3cd92c958ac816f7fbacb82cb7438c0e12af 100644
--- a/GUI/Model/CatDevice/BackgroundItemCatalog.h
+++ b/GUI/Model/CatDevice/BackgroundItemCatalog.h
@@ -35,10 +35,7 @@ public:
     //! Creates the item of the given type.
     static BackgroundItem* create(Type type);
 
-    //! Available types of items.
-    //!
-    //! Contains also type "None".
-    //! This list is sorted as expected in the UI (e.g. in combo box)
+    //! List of available types, sorted as expected in the UI.
     static QVector<Type> types();
 
     //! UiInfo on the given type.
diff --git a/GUI/Model/CatDevice/DetectorItemCatalog.h b/GUI/Model/CatDevice/DetectorItemCatalog.h
index 6d114b3e84c82d5c6575f4d3c76823beb31cb7b4..012e29d4bd045475d8f26f045dffef36487e1ba2 100644
--- a/GUI/Model/CatDevice/DetectorItemCatalog.h
+++ b/GUI/Model/CatDevice/DetectorItemCatalog.h
@@ -35,9 +35,7 @@ public:
     //! Creates the item of the given type.
     static DetectorItem* create(Type type);
 
-    //! Available types of items.
-    //!
-    //! This list is sorted as expected in the UI (e.g. in combo box)
+    //! List of available types, sorted as expected in the UI.
     static QVector<Type> types();
 
     //! UiInfo on the given type.
diff --git a/GUI/Model/CatDevice/DistributionItemCatalog.h b/GUI/Model/CatDevice/DistributionItemCatalog.h
index 587d439babaef206dec2fcbb481be8d2b5dff802..e685977d3561ef0e8da251722015822afb4ff76d 100644
--- a/GUI/Model/CatDevice/DistributionItemCatalog.h
+++ b/GUI/Model/CatDevice/DistributionItemCatalog.h
@@ -44,16 +44,9 @@ public:
     //! Creates the item of the given type.
     static DistributionItem* create(Type type);
 
-    //! Available types of items.
-    //!
-    //! Contains also type "None".
-    //! This list is sorted as expected in the UI (e.g. in combo box)
+    //! List of available types, sorted as expected in the UI.
     static QVector<Type> types();
 
-    //! Types of symmetric distributions
-    //!
-    //! Contains also type "None".
-    //! This list is sorted as expected in the UI (e.g. in combo box)
     static QVector<Type> symmetricTypes();
 
     //! UiInfo on the given type.
diff --git a/GUI/Model/CatDevice/FootprintItemCatalog.h b/GUI/Model/CatDevice/FootprintItemCatalog.h
index cb253eabb12e9989ce05e0b062d936d9df360f44..4e426100b26e1dc31725bde6b17a47917f621afc 100644
--- a/GUI/Model/CatDevice/FootprintItemCatalog.h
+++ b/GUI/Model/CatDevice/FootprintItemCatalog.h
@@ -35,10 +35,7 @@ public:
     //! Creates the item of the given type.
     static FootprintItem* create(Type type);
 
-    //! Available types of items.
-    //!
-    //! Contains also type "None".
-    //! This list is sorted as expected in the UI (e.g. in combo box)
+    //! List of available types, sorted as expected in the UI.
     static QVector<Type> types();
 
     //! UiInfo on the given type.
diff --git a/GUI/Model/CatDevice/InstrumentItemCatalog.h b/GUI/Model/CatDevice/InstrumentItemCatalog.h
index d7410893ccf57c8e367019c2b28f29412634c291..5ed3fe26a5c320534e28942f7b327de35c4008ff 100644
--- a/GUI/Model/CatDevice/InstrumentItemCatalog.h
+++ b/GUI/Model/CatDevice/InstrumentItemCatalog.h
@@ -35,7 +35,7 @@ public:
     //! Creates the item of the given type.
     static InstrumentItem* create(Type type);
 
-    //! Available types of items.
+    //! List of available types, sorted as expected in the UI.
     static QVector<Type> types();
 
     //! UiInfo on the given type.
diff --git a/GUI/Model/CatDevice/MaskItemCatalog.h b/GUI/Model/CatDevice/MaskItemCatalog.h
index 13dda1ad72e669a44513b998658004ad99d69160..7192681b0183576f532cb8aed4179c3866ad1278 100644
--- a/GUI/Model/CatDevice/MaskItemCatalog.h
+++ b/GUI/Model/CatDevice/MaskItemCatalog.h
@@ -43,7 +43,7 @@ public:
     //! Creates the item of the given type.
     static MaskItem* create(Type type);
 
-    //! Available types of items.
+    //! List of available types, sorted as expected in the UI.
     static QVector<Type> types();
 
     //! UiInfo on the given type.
diff --git a/GUI/Model/CatDevice/ResolutionFunctionItemCatalog.h b/GUI/Model/CatDevice/ResolutionFunctionItemCatalog.h
index e36eb22f9fb98dcf3d81cd02fda141ae4f0bae5f..b0d4e0bf8006ff7dc795b4a6615236dcb6709077 100644
--- a/GUI/Model/CatDevice/ResolutionFunctionItemCatalog.h
+++ b/GUI/Model/CatDevice/ResolutionFunctionItemCatalog.h
@@ -38,9 +38,7 @@ public:
     static ResolutionFunctionItem* create(Type type,
                                           const std::variant<QString, Unit>& unit = Unit::unitless);
 
-    //! Available types of items.
-    //!
-    //! This list is sorted as expected in the UI (e.g. in combo box)
+    //! List of available types, sorted as expected in the UI.
     static QVector<Type> types();
 
     //! UiInfo on the given type.
diff --git a/GUI/Model/CatSample/FormFactorItemCatalog.h b/GUI/Model/CatSample/FormFactorItemCatalog.h
index 23f63fb95d80a0a9e2a518078953e989edfca796..2e5f45e72a6859da1645c046f74e50fda827ba49 100644
--- a/GUI/Model/CatSample/FormFactorItemCatalog.h
+++ b/GUI/Model/CatSample/FormFactorItemCatalog.h
@@ -67,20 +67,14 @@ public:
 
 
     //! Creates the item of the given type.
-    //!
-    //! If type is "None", a nullptr is returned.
     static FormFactorItem* create(Type type);
 
-    //! Available types of interference items.
-    //!
-    //! Contains also type "None".
-    //! This list is sorted as expected in the UI (e.g. in combo box)
+    //! List of available types, sorted as expected in the UI.
     static QVector<Type> types();
 
     static QVector<Type> hardParticleTypes();
     static QVector<Type> rippleTypes();
 
-
     //! UiInfo on the given type.
     static UiInfo uiInfo(Type t);
 
diff --git a/GUI/Model/CatSample/InterferenceItemCatalog.h b/GUI/Model/CatSample/InterferenceItemCatalog.h
index faa552cf81d2c52236951d61ff502c55c8a12921..ff1eee9a65bc625611f40f8fd0c3b43eb5be0fc7 100644
--- a/GUI/Model/CatSample/InterferenceItemCatalog.h
+++ b/GUI/Model/CatSample/InterferenceItemCatalog.h
@@ -43,14 +43,9 @@ public:
 
 
     //! Creates the item of the given type.
-    //!
-    //! If type is "None", a nullptr is returned.
     static InterferenceItem* create(Type type);
 
-    //! Available types of interference items.
-    //!
-    //! Contains also type "None".
-    //! This list is sorted as expected in the UI (e.g. in combo box)
+    //! List of available types, sorted as expected in the UI.
     static QVector<Type> types();
 
     //! UiInfo on the given type.
diff --git a/GUI/Model/CatSample/ItemWithParticlesCatalog.h b/GUI/Model/CatSample/ItemWithParticlesCatalog.h
index ee86c51d28d8aa7b439bd63292ad14473d634c24..798a191925d6b140be4d043b3ee0db5db88cdd22 100644
--- a/GUI/Model/CatSample/ItemWithParticlesCatalog.h
+++ b/GUI/Model/CatSample/ItemWithParticlesCatalog.h
@@ -35,14 +35,11 @@ public:
     };
 
     //! Creates the item of the given type.
-    //!
-    //! If type is "None", a nullptr is returned.
     static ItemWithParticles* create(Type type, const MaterialModel* materials);
 
-    //! Available types of items, sorted as expected in the UI (e.g. in combo box)
+    //! List of available types, sorted as expected in the UI.
     static QVector<Type> types();
 
-    //! Available types of assembly items, sorted as expected in the UI (e.g. in combo box)
     static QVector<Type> assemblyTypes();
 
     //! UiInfo on the given type.
diff --git a/GUI/Model/CatSample/RotationItemCatalog.h b/GUI/Model/CatSample/RotationItemCatalog.h
index 4b7030809b90c48a1886befb498fc9aa2757c7c7..57e12c7705cdb61b9d8135ab0ae755c0c168e38a 100644
--- a/GUI/Model/CatSample/RotationItemCatalog.h
+++ b/GUI/Model/CatSample/RotationItemCatalog.h
@@ -40,14 +40,9 @@ public:
     };
 
     //! Creates the item of the given type.
-    //!
-    //! If type is "None", a nullptr is returned.
     static RotationItem* create(Type type);
 
-    //! Available types of interference items.
-    //!
-    //! Contains also type "None".
-    //! This list is sorted as expected in the UI (e.g. in combo box)
+    //! List of available types, sorted as expected in the UI.
     static QVector<Type> types();
 
     //! UiInfo on the given type.
diff --git a/GUI/Model/CatSample/RoughnessItemCatalog.h b/GUI/Model/CatSample/RoughnessItemCatalog.h
index f50ac649d391af43f5610a067f94a69c9d6375b5..92f8076a52b1ae852155b5c45086b791497231b2 100644
--- a/GUI/Model/CatSample/RoughnessItemCatalog.h
+++ b/GUI/Model/CatSample/RoughnessItemCatalog.h
@@ -34,14 +34,9 @@ public:
     };
 
     //! Creates the item of the given type.
-    //!
-    //! If type is "None", a nullptr is returned.
     static RoughnessItem* create(Type type);
 
-    //! Available types of interference items.
-    //!
-    //! Contains also type "None".
-    //! This list is sorted as expected in the UI (e.g. in combo box)
+    //! List of available types, sorted as expected in the UI.
     static QVector<Type> types();
 
     //! UiInfo on the given type.