diff --git a/Modules/Forms/include/mitkCheckboxesQuestion.h b/Modules/Forms/include/mitkCheckboxesQuestion.h
index 713263f095..2dac18b3a1 100644
--- a/Modules/Forms/include/mitkCheckboxesQuestion.h
+++ b/Modules/Forms/include/mitkCheckboxesQuestion.h
@@ -1,42 +1,49 @@
 /*============================================================================
 
 The Medical Imaging Interaction Toolkit (MITK)
 
 Copyright (c) German Cancer Research Center (DKFZ)
 All rights reserved.
 
 Use of this source code is governed by a 3-clause BSD license that can be
 found in the LICENSE file.
 
 ============================================================================*/
 
 #ifndef mitkCheckboxesQuestion_h
 #define mitkCheckboxesQuestion_h
 
 #include <mitkQuestionWithOtherOption.h>
 
 namespace mitk::Forms
 {
+  /** \brief A Question whose possible responses are represented by checkboxes.
+   *
+   * The question can have multiple responses at once, including an optional
+   * free text response.
+   *
+   * \sa MultipleChoiceQuestion, DropdownQuestion
+   */
   class MITKFORMS_EXPORT CheckboxesQuestion : public QuestionWithOtherOption
   {
   public:
     ~CheckboxesQuestion() override;
 
     std::string GetType() const override;
     Question* CreateAnother() const override;
 
     void FromJSON(const nlohmann::ordered_json& j) override;
     void ToJSON(nlohmann::ordered_json& j) const override;
 
     using QuestionWithOptions::AddResponse;
     using QuestionWithOptions::RemoveResponse;
 
     using QuestionWithOtherOption::AddOtherResponse;
     using QuestionWithOtherOption::RemoveOtherResponse;
   };
 
   MITKFORMS_EXPORT void from_json(const nlohmann::ordered_json& j, CheckboxesQuestion& q);
   MITKFORMS_EXPORT void to_json(nlohmann::ordered_json& j, const CheckboxesQuestion& q);
 }
 
 #endif
diff --git a/Modules/Forms/include/mitkDropdownQuestion.h b/Modules/Forms/include/mitkDropdownQuestion.h
index bcd4f61d54..ac93d62b3b 100644
--- a/Modules/Forms/include/mitkDropdownQuestion.h
+++ b/Modules/Forms/include/mitkDropdownQuestion.h
@@ -1,38 +1,44 @@
 /*============================================================================
 
 The Medical Imaging Interaction Toolkit (MITK)
 
 Copyright (c) German Cancer Research Center (DKFZ)
 All rights reserved.
 
 Use of this source code is governed by a 3-clause BSD license that can be
 found in the LICENSE file.
 
 ============================================================================*/
 
 #ifndef mitkDropdownQuestion_h
 #define mitkDropdownQuestion_h
 
 #include <mitkQuestionWithOptions.h>
 
 namespace mitk::Forms
 {
+  /** \brief A Question whose possible responses are represented by a combo box.
+   *
+   * The question can have a single response.
+   *
+   * \sa MultipleChoiceQuestion, CheckboxesQuestion
+   */
   class MITKFORMS_EXPORT DropdownQuestion : public QuestionWithOptions
   {
   public:
     ~DropdownQuestion() override;
 
     std::string GetType() const override;
     Question* CreateAnother() const override;
 
     void FromJSON(const nlohmann::ordered_json& j) override;
     void ToJSON(nlohmann::ordered_json& j) const override;
 
     using QuestionWithOptions::SetResponse;
   };
 
   MITKFORMS_EXPORT void from_json(const nlohmann::ordered_json& j, DropdownQuestion& q);
   MITKFORMS_EXPORT void to_json(nlohmann::ordered_json& j, const DropdownQuestion& q);
 }
 
 #endif
diff --git a/Modules/Forms/include/mitkForm.h b/Modules/Forms/include/mitkForm.h
index de947ede9e..2d9712779c 100644
--- a/Modules/Forms/include/mitkForm.h
+++ b/Modules/Forms/include/mitkForm.h
@@ -1,87 +1,93 @@
 /*============================================================================
 
 The Medical Imaging Interaction Toolkit (MITK)
 
 Copyright (c) German Cancer Research Center (DKFZ)
 All rights reserved.
 
 Use of this source code is governed by a 3-clause BSD license that can be
 found in the LICENSE file.
 
 ============================================================================*/
 
 #ifndef mitkForm_h
 #define mitkForm_h
 
 #include <mitkFileSystem.h>
 #include <MitkFormsExports.h>
 
 #include <memory>
 #include <string>
 #include <vector>
 
 #include <nlohmann/json_fwd.hpp>
 
 namespace mitk::Forms
 {
   class Question;
 
+  /** A form consisting of questions possibly divided into multiple sections/pages.
+   *
+   * A form always has at least a single section, which is also used to define the form's general
+   * title and description. Helper methods like SetTitle() or SetDescription() can be used to
+   * conveniently set these properties of the first section.
+   */
   class MITKFORMS_EXPORT Form
   {
   public:
     class MITKFORMS_EXPORT Section
     {
     public:
       explicit Section(const std::string& title = "", const std::string& description = "");
       ~Section();
 
       Section(Section&& other) noexcept;
       Section& operator=(Section&& other) noexcept;
 
       std::string GetTitle() const;
       void SetTitle(const std::string& title);
 
       std::string GetDescription() const;
       void SetDescription(const std::string& description);
 
       std::vector<Question*> GetQuestions() const;
       void AddQuestion(Question* question);
 
     private:
       std::string m_Title;
       std::string m_Description;
       std::vector<std::unique_ptr<Question>> m_Questions;
     };
 
     explicit Form(const std::string& title = "", const std::string& description = "");
     ~Form();
 
     Form(Form&& other) noexcept;
     Form& operator=(Form&& other) noexcept;
 
     Section& AddSection(const std::string& title = "", const std::string& description = "");
     int GetNumberOfSections() const;
 
     Section& GetSection(int index);
     const Section& GetSection(int index) const;
 
     std::string GetTitle() const;
     void SetTitle(const std::string& title);
 
     std::string GetDescription() const;
     void SetDescription(const std::string& description);
 
     std::vector<Question*> GetQuestions() const;
     void AddQuestion(Question* question);
 
     void Submit(const fs::path& csvPath) const;
 
   private:
     std::vector<Section> m_Sections;
   };
 
   MITKFORMS_EXPORT void from_json(const nlohmann::ordered_json& j, Form& f);
   MITKFORMS_EXPORT void to_json(nlohmann::ordered_json& j, const Form& f);
 }
 
 #endif
diff --git a/Modules/Forms/include/mitkIQuestionFactory.h b/Modules/Forms/include/mitkIQuestionFactory.h
index 7ba8ac78ae..6dcd8fffa6 100644
--- a/Modules/Forms/include/mitkIQuestionFactory.h
+++ b/Modules/Forms/include/mitkIQuestionFactory.h
@@ -1,39 +1,61 @@
 /*============================================================================
 
 The Medical Imaging Interaction Toolkit (MITK)
 
 Copyright (c) German Cancer Research Center (DKFZ)
 All rights reserved.
 
 Use of this source code is governed by a 3-clause BSD license that can be
 found in the LICENSE file.
 
 ============================================================================*/
 
 #ifndef mitkIQuestionFactory_h
 #define mitkIQuestionFactory_h
 
 #include <mitkServiceInterface.h>
 #include <MitkFormsExports.h>
 
 #include <string>
 
 namespace mitk::Forms
 {
   class Question;
 
+  /** \brief Register subclasses of Question to create instances of them based on their type string.
+   *
+   * This is a service interface. Obtain a pointer to its single instance via GetInstance().
+   *
+   * Each Question subclass must be registered by calling Register(), which is typically done
+   * in the module activator class. After Question subclasses are registered, instances of them
+   * can be created with Create() based on their type string. This mechanism is primarily used
+   * for the deserialization of questions.
+   */
   class MITKFORMS_EXPORT IQuestionFactory
   {
   public:
+    /** \brief Obtain a pointer to the single instance of this service.
+     */
     static IQuestionFactory* GetInstance();
 
     virtual ~IQuestionFactory();
 
+    /** \brief Register a Question subclass for the instance creation based on its type string.
+     *
+     * The service takes over ownership of the passed Question pointer.
+     *
+     * \sa Question::GetType()
+     */
     virtual void Register(Question* question) = 0;
+
+    /** \brief Create an instance of a Question subclass based on its type string.
+     *
+     * \sa Question::GetType(), Question::CreateAnother()
+     */
     virtual Question* Create(const std::string& type) const = 0;
   };
 }
 
 MITK_DECLARE_SERVICE_INTERFACE(mitk::Forms::IQuestionFactory, "org.mitk.Forms.IQuestionFactory")
 
 #endif
diff --git a/Modules/Forms/include/mitkLinearScaleQuestion.h b/Modules/Forms/include/mitkLinearScaleQuestion.h
index 87b8a84767..c5b01cdce3 100644
--- a/Modules/Forms/include/mitkLinearScaleQuestion.h
+++ b/Modules/Forms/include/mitkLinearScaleQuestion.h
@@ -1,58 +1,72 @@
 /*============================================================================
 
 The Medical Imaging Interaction Toolkit (MITK)
 
 Copyright (c) German Cancer Research Center (DKFZ)
 All rights reserved.
 
 Use of this source code is governed by a 3-clause BSD license that can be
 found in the LICENSE file.
 
 ============================================================================*/
 
 #ifndef mitkLinearScaleQuestion_h
 #define mitkLinearScaleQuestion_h
 
 #include <mitkQuestion.h>
 #include <optional>
 #include <utility>
 
 namespace mitk::Forms
 {
+  /** \brief A Question whose possible responses are represented by a discrete linear scale.
+   *
+   * The question can have a single response, which is one of the numbers within the allowed
+   * range. The range must start with 0 or 1 and end with any number between 2 and 10 (1 to 5
+   * by default).
+   */
   class MITKFORMS_EXPORT LinearScaleQuestion : public Question
   {
   public:
     LinearScaleQuestion();
     ~LinearScaleQuestion() override;
 
     std::string GetType() const override;
     Question* CreateAnother() const override;
 
     void FromJSON(const nlohmann::ordered_json& j) override;
     void ToJSON(nlohmann::ordered_json& j) const override;
 
     std::vector<std::string> GetResponsesAsStrings() const override;
     void ClearResponses() override;
 
     bool IsComplete() const override;
 
     std::optional<int> GetResponse() const;
     void SetResponse(int response);
 
     std::pair<int, int> GetRange() const;
+
+    /** \brief Set the allowed range of numbers for a valid response.
+     *
+     * A valid range must start with 0 or 1 and end with any number between 2 and 10 (1 to 5
+     * by default).
+     *
+     * \exception Exception Invalid range.
+     */
     void SetRange(const std::pair<int, int>& range);
 
     std::pair<std::string, std::string> GetRangeLabels() const;
     void SetRangeLabels(const std::pair<std::string, std::string>& labels);
 
   private:
     std::optional<int> m_Response;
     std::pair<int, int> m_Range;
     std::pair<std::string, std::string> m_Labels;
   };
 
   MITKFORMS_EXPORT void from_json(const nlohmann::ordered_json& j, LinearScaleQuestion& q);
   MITKFORMS_EXPORT void to_json(nlohmann::ordered_json& j, const LinearScaleQuestion& q);
 }
 
 #endif
diff --git a/Modules/Forms/include/mitkMultipleChoiceQuestion.h b/Modules/Forms/include/mitkMultipleChoiceQuestion.h
index 90100ef835..9ff48b749f 100644
--- a/Modules/Forms/include/mitkMultipleChoiceQuestion.h
+++ b/Modules/Forms/include/mitkMultipleChoiceQuestion.h
@@ -1,39 +1,45 @@
 /*============================================================================
 
 The Medical Imaging Interaction Toolkit (MITK)
 
 Copyright (c) German Cancer Research Center (DKFZ)
 All rights reserved.
 
 Use of this source code is governed by a 3-clause BSD license that can be
 found in the LICENSE file.
 
 ============================================================================*/
 
 #ifndef mitkMultipleChoiceQuestion_h
 #define mitkMultipleChoiceQuestion_h
 
 #include <mitkQuestionWithOtherOption.h>
 
 namespace mitk::Forms
 {
+  /** \brief A Question whose possible responses are represented by radio buttons.
+   *
+   * The question can have a single response, which can optionally be free text.
+   *
+   * \sa CheckboxesQuestion, DropdownQuestion
+   */
   class MITKFORMS_EXPORT MultipleChoiceQuestion : public QuestionWithOtherOption
   {
   public:
     ~MultipleChoiceQuestion() override;
 
     std::string GetType() const override;
     Question* CreateAnother() const override;
 
     void FromJSON(const nlohmann::ordered_json& j) override;
     void ToJSON(nlohmann::ordered_json& j) const override;
 
     using QuestionWithOptions::SetResponse;
     using QuestionWithOtherOption::SetOtherResponse;
   };
 
   MITKFORMS_EXPORT void from_json(const nlohmann::ordered_json& j, MultipleChoiceQuestion& q);
   MITKFORMS_EXPORT void to_json(nlohmann::ordered_json& j, const MultipleChoiceQuestion& q);
 }
 
 #endif
diff --git a/Modules/Forms/include/mitkParagraphQuestion.h b/Modules/Forms/include/mitkParagraphQuestion.h
index 700b6a1e6e..68574c8a0d 100644
--- a/Modules/Forms/include/mitkParagraphQuestion.h
+++ b/Modules/Forms/include/mitkParagraphQuestion.h
@@ -1,36 +1,40 @@
 /*============================================================================
 
 The Medical Imaging Interaction Toolkit (MITK)
 
 Copyright (c) German Cancer Research Center (DKFZ)
 All rights reserved.
 
 Use of this source code is governed by a 3-clause BSD license that can be
 found in the LICENSE file.
 
 ============================================================================*/
 
 #ifndef mitkParagraphQuestion_h
 #define mitkParagraphQuestion_h
 
 #include <mitkTextQuestion.h>
 
 namespace mitk::Forms
 {
+  /** \brief A Question whose possible response is free text.
+   *
+   * \sa ShortAnswerQuestion
+   */
   class MITKFORMS_EXPORT ParagraphQuestion : public TextQuestion
   {
   public:
     ~ParagraphQuestion() override;
 
     std::string GetType() const override;
     Question* CreateAnother() const override;
 
     void FromJSON(const nlohmann::ordered_json& j) override;
     void ToJSON(nlohmann::ordered_json& j) const override;
   };
 
   MITKFORMS_EXPORT void from_json(const nlohmann::ordered_json& j, ParagraphQuestion& q);
   MITKFORMS_EXPORT void to_json(nlohmann::ordered_json& j, const ParagraphQuestion& q);
 }
 
 #endif
diff --git a/Modules/Forms/include/mitkShortAnswerQuestion.h b/Modules/Forms/include/mitkShortAnswerQuestion.h
index cd3c79a9c5..4d90af707e 100644
--- a/Modules/Forms/include/mitkShortAnswerQuestion.h
+++ b/Modules/Forms/include/mitkShortAnswerQuestion.h
@@ -1,36 +1,40 @@
 /*============================================================================
 
 The Medical Imaging Interaction Toolkit (MITK)
 
 Copyright (c) German Cancer Research Center (DKFZ)
 All rights reserved.
 
 Use of this source code is governed by a 3-clause BSD license that can be
 found in the LICENSE file.
 
 ============================================================================*/
 
 #ifndef mitkShortAnswerQuestion_h
 #define mitkShortAnswerQuestion_h
 
 #include <mitkTextQuestion.h>
 
 namespace mitk::Forms
 {
+  /** \brief A Question whose possible response is a short single-line free text.
+   *
+   * \sa ParagraphQuestion
+   */
   class MITKFORMS_EXPORT ShortAnswerQuestion : public TextQuestion
   {
   public:
     ~ShortAnswerQuestion() override;
 
     std::string GetType() const override;
     Question* CreateAnother() const override;
 
     void FromJSON(const nlohmann::ordered_json& j) override;
     void ToJSON(nlohmann::ordered_json& j) const override;
   };
 
   MITKFORMS_EXPORT void from_json(const nlohmann::ordered_json& j, ShortAnswerQuestion& q);
   MITKFORMS_EXPORT void to_json(nlohmann::ordered_json& j, const ShortAnswerQuestion& q);
 }
 
 #endif