diff --git a/inc/xna/graphics/viewport.hpp b/inc/xna/graphics/viewport.hpp
index 882eb0a..43dd290 100644
--- a/inc/xna/graphics/viewport.hpp
+++ b/inc/xna/graphics/viewport.hpp
@@ -4,12 +4,19 @@
 #include "../common/numerics.hpp"
 
 namespace xna {
+	//Defines the window dimensions of a render-target surface onto which a 3D volume projects. 
 	struct Viewport {
+		//Gets or sets the pixel coordinate of the upper-left corner of the viewport on the render-target surface.
 		float X{ 0 };
+		//Gets or sets the pixel coordinate of the upper-left corner of the viewport on the render-target surface.
 		float Y{ 0 };
+		//Gets or sets the width dimension of the viewport on the render-target surface, in pixels.
 		float Width{ 0 };
+		//Gets or sets the height dimension of the viewport on the render-target surface, in pixels.
 		float Height{ 0 };
+		//Gets or sets the minimum depth of the clip volume.
 		float MinDetph{ 0 };
+		//Gets or sets the maximum depth of the clip volume.
 		float MaxDepth{ 1.0F };
 
 		constexpr Viewport() = default;
@@ -26,6 +33,7 @@ namespace xna {
 				&& MaxDepth == other.MaxDepth;
 		}
 
+		//Gets the size of this resource.
 		constexpr Rectangle Bounds() const {
 			return { 
 				static_cast<int>(X),