diff --git a/include/app/ModuleWidget.hpp b/include/app/ModuleWidget.hpp
index ac01720b..bbe0c0f2 100644
--- a/include/app/ModuleWidget.hpp
+++ b/include/app/ModuleWidget.hpp
@@ -18,6 +18,7 @@ struct ModuleWidget : widget::OpaqueWidget {
 	struct Internal;
 	Internal* internal;
 
+	/** Not owned */
 	plugin::Model* model = NULL;
 	/** Owned */
 	engine::Module* module = NULL;
@@ -28,18 +29,19 @@ struct ModuleWidget : widget::OpaqueWidget {
 	}
 	~ModuleWidget();
 
+	/** Returns the Model instance of this ModuleWidget. */
 	plugin::Model* getModel();
 	void setModel(plugin::Model* model);
 
-	/** Returns the attached Module. */
+	/** Returns Module attached to this ModuleWidget. */
 	engine::Module* getModule();
-	/** Returns the attached Module, casted to the given Module type. */
+	/** Returns Module attached to this ModuleWidget, casted to the given Module type. */
 	template <class TModule>
 	TModule* getModule() {
 		return dynamic_cast<TModule*>(getModule());
 	}
 	/** Associates this ModuleWidget with the Module.
-	Transfers ownership.
+	Transfers ownership to `this`.
 	*/
 	void setModule(engine::Module* module);
 
diff --git a/include/engine/Module.hpp b/include/engine/Module.hpp
index cf7b13a8..23d9b39f 100644
--- a/include/engine/Module.hpp
+++ b/include/engine/Module.hpp
@@ -30,15 +30,19 @@ struct Module {
 	struct Internal;
 	Internal* internal;
 
+	/** Not owned. */
 	plugin::Model* model = NULL;
+
 	/** Unique ID for referring to the module in the engine.
-	Between 0 and 2^53 since this is serialized with JSON.
+	Between 0 and 2^53-1 since the number is serialized with JSON.
 	Assigned when added to the engine.
 	*/
 	int64_t id = -1;
 
 	/** Arrays of components.
-	Initialized with config().
+	Initialized using config().
+
+	It is recommended to call getParam(), getInput(), etc. instead of accessing these directly.
 	*/
 	std::vector<Param> params;
 	std::vector<Input> inputs;
@@ -46,8 +50,10 @@ struct Module {
 	std::vector<Light> lights;
 
 	/** Arrays of component metadata.
-	Initialized with configParam(), configInput(), configOutput(), and configLight().
+	Initialized using configParam(), configInput(), configOutput(), and configLight().
 	LightInfos are initialized to null unless configLight() is called.
+
+	It is recommended to call getParamQuantity(), getInputInfo(), etc. instead of accessing these directly.
 	*/
 	std::vector<ParamQuantity*> paramQuantities;
 	std::vector<PortInfo*> inputInfos;