diff --git a/src/frontend/InventoryView.cpp b/src/frontend/InventoryView.cpp
index 12665300..e5e6dab5 100644
--- a/src/frontend/InventoryView.cpp
+++ b/src/frontend/InventoryView.cpp
@@ -259,7 +259,7 @@ void SlotView::clicked(gui::GUI* gui, mousecode button) {
     }
 }
 
-void SlotView::focus(gui::GUI* gui) {
+void SlotView::onFocus(gui::GUI* gui) {
     clicked(gui, mousecode::BUTTON_1);
 }
 
diff --git a/src/frontend/InventoryView.h b/src/frontend/InventoryView.h
index 7cab1131..93258e8a 100644
--- a/src/frontend/InventoryView.h
+++ b/src/frontend/InventoryView.h
@@ -73,7 +73,7 @@ public:
     bool isHighlighted() const;
 
     virtual void clicked(gui::GUI*, mousecode) override;
-    virtual void focus(gui::GUI*) override;
+    virtual void onFocus(gui::GUI*) override;
 
     void bind(
         int64_t inventoryid,
diff --git a/src/frontend/gui/GUI.cpp b/src/frontend/gui/GUI.cpp
index a55ce768..f3146e49 100644
--- a/src/frontend/gui/GUI.cpp
+++ b/src/frontend/gui/GUI.cpp
@@ -58,7 +58,7 @@ void GUI::actMouse(float delta) {
             }
             if (focus != pressed) {
                 focus = pressed;
-                focus->focus(this);
+                focus->onFocus(this);
                 return;
             }
         }
@@ -175,7 +175,7 @@ void GUI::setFocus(std::shared_ptr<UINode> node) {
     }
     focus = node;
     if (focus) {
-        focus->focus(this);
+        focus->onFocus(this);
     }
 }
 
diff --git a/src/frontend/gui/UINode.h b/src/frontend/gui/UINode.h
index a79717cf..eadfa5ca 100644
--- a/src/frontend/gui/UINode.h
+++ b/src/frontend/gui/UINode.h
@@ -24,34 +24,50 @@ namespace gui {
         top=left, bottom=right,
     };
 
+    /// @brief Base abstract class for all UI elements
     class UINode {
-        /** 
-         * element identifier used for direct access in UiDocument
-        */
+        /// @brief element identifier used for direct access in UiDocument
         std::string id = "";
     protected:
+        /// @brief element position within the parent element
         glm::vec2 pos {0.0f};
+        /// @brief element size (width, height)
         glm::vec2 size;
+        /// @brief minimal element size
         glm::vec2 minSize {1.0f};
+        /// @brief element primary color (background-color or text-color if label)
         glm::vec4 color {1.0f};
+        /// @brief element color when mouse is over it
         glm::vec4 hoverColor {1.0f};
+        /// @brief element margin (only supported for Panel sub-nodes)
         glm::vec4 margin {1.0f};
+        /// @brief is element visible
         bool visible = true;
+        /// @brief is mouse over the element
         bool hover = false;
+        /// @brief is mouse has been pressed over the element and not released yet
         bool pressed = false;
+        /// @brief is element focused
         bool focused = false;
+        /// @brief is element opaque for cursor interaction
         bool interactive = true;
+        /// @brief does the element support resizing by parent elements
         bool resizing = true;
+        /// @brief z-index property specifies the stack order of an element
         int zindex = 0;
+        /// @brief element content alignment (supported by Label only)
         Align align = Align::left;
+        /// @brief parent element
         UINode* parent = nullptr;
+        /// @brief position supplier for the element (called on parent element size update)
         vec2supplier positionfunc = nullptr;
+
         UINode(glm::vec2 size);
     public:
         virtual ~UINode();
-        /** Called every frame for all visible elements 
-         * @param delta delta time
-        */
+
+        /// @brief Called every frame for all visible elements 
+        /// @param delta delta timУ
         virtual void act(float delta) {};
         virtual void draw(const GfxContext* pctx, Assets* assets) = 0;
 
@@ -67,11 +83,12 @@ namespace gui {
         virtual void setParent(UINode* node);
         UINode* getParent() const;
 
-        /** Set element color (doesn't affect inner elements).
-           Also replaces hover color to avoid adding extra properties. */
+        /// @brief Set element color (doesn't affect inner elements).
+        /// Also replaces hover color to avoid adding extra properties
         virtual void setColor(glm::vec4 newColor);
 
-        /** Get element color (float R,G,B,A in range [0.0, 1.0])*/
+        /// @brief Get element color 
+        /// @return (float R,G,B,A in range [0.0, 1.0])
         glm::vec4 getColor() const;
 
         virtual void setHoverColor(glm::vec4 newColor);
@@ -80,12 +97,14 @@ namespace gui {
         virtual void setMargin(glm::vec4 margin);
         glm::vec4 getMargin() const;
 
-        /** Influences container elements sort order 
-            Doesn't work in Panel */
+        /// @brief Specifies the stack order of an element
+        /// @attention Is not supported by Panel
         virtual void setZIndex(int idx);
+        
+        /// @brief Get element z-index
         int getZIndex() const;
 
-        virtual void focus(GUI*) {focused = true;}
+        virtual void onFocus(GUI*) {focused = true;}
         virtual void click(GUI*, int x, int y);
         virtual void clicked(GUI*, mousecode button) {}
         virtual void mouseMove(GUI*, int x, int y) {};
diff --git a/src/frontend/gui/controls.cpp b/src/frontend/gui/controls.cpp
index a7165662..d6e2b413 100644
--- a/src/frontend/gui/controls.cpp
+++ b/src/frontend/gui/controls.cpp
@@ -585,8 +585,8 @@ void TextBox::setOnEditStart(runnable oneditstart) {
     onEditStart = oneditstart;
 }
 
-void TextBox::focus(GUI* gui) {
-    Panel::focus(gui);
+void TextBox::onFocus(GUI* gui) {
+    Panel::onFocus(gui);
     if (onEditStart){
         setCaret(input.size());
         onEditStart();
diff --git a/src/frontend/gui/controls.h b/src/frontend/gui/controls.h
index 539e46a9..79cacf38 100644
--- a/src/frontend/gui/controls.h
+++ b/src/frontend/gui/controls.h
@@ -272,7 +272,7 @@ namespace gui {
         /// @brief Set runnable called on textbox focus
         virtual void setOnEditStart(runnable oneditstart);
 
-        virtual void focus(GUI*) override;
+        virtual void onFocus(GUI*) override;
         virtual void refresh() override;
         virtual void click(GUI*, int, int) override;
         virtual void mouseMove(GUI*, int x, int y) override;