diff --git a/Default-shader-parameters.md b/Default-shader-parameters.md
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-The default shaders included in raylib defines the following default input and output parameters if no user-provided vertex or fragment shader is provided.
-
-Source: [rlgl.h](https://github.com/raysan5/raylib/blob/master/src/rlgl.h)
-
-## Default vertex shader
-
-OPENGL_ES2 or OPENGL_21
-```
-attribute vec3 vertexPosition;
-attribute vec2 vertexTexCoord;
-attribute vec4 vertexColor;
-varying vec2 fragTexCoord;
-varying vec4 fragColor;
-```
-
-OPENGL_33
-```
-in vec3 vertexPosition;
-in vec2 vertexTexCoord;
-in vec4 vertexColor;
-out vec2 fragTexCoord;
-out vec4 fragColor;
-```
-
-## Default fragment shader
-
-OPENGL_ES2 or OPENGL_21
-```
-varying vec2 fragTexCoord;
-varying vec4 fragColor;
-```
-OPENGL_ES2 also defines
-```
-precision mediump float;
-```
-
-OPENGL_33
-```
-in vec2 fragTexCoord;
-in vec4 fragColor;
-out vec4 finalColor;
-```
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diff --git a/raylib-default-shader.md b/raylib-default-shader.md
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+The default shaders included in raylib defines the following default input and output parameters if no custom shader is provided by user.
+
+For custom shaders usage check [raylib custom shader page](raylib-generic-uber-shader-and-custom-shaders).
+
+Default shader source is embedded as a string in [rlgl.h](https://github.com/raysan5/raylib/blob/master/src/rlgl.h) module. Note that there are multiple GLSL shader versions for the multiple OpenGL versions supported.
+
+## default vertex shader input/output parameters
+
+_OPENGL_ES2 or OPENGL_21_
+```glsl
+attribute vec3 vertexPosition;   // Vertex input attribute: position
+attribute vec2 vertexTexCoord;   // Vertex input attribute: texture coordinate
+attribute vec4 vertexColor;      // Vertex input attribute: color
+varying vec2 fragTexCoord;       // To-fragment attribute: texture coordinate
+varying vec4 fragColor;          // To-fragment attribute: color
+```
+
+_OPENGL_33_
+```glsl
+in vec3 vertexPosition;     // Vertex input attribute: position
+in vec2 vertexTexCoord;     // Vertex input attribute: texture coordinate
+in vec4 vertexColor;        // Vertex input attribute: color
+out vec2 fragTexCoord;      // To-fragment attribute: texture coordinate
+out vec4 fragColor;         // To-fragment attribute: color
+```
+
+## default fragment shader input/output parameters
+
+_OPENGL_ES2 or OPENGL_21_
+```glsl
+varying vec2 fragTexCoord;  // Fragment input attribute: texture coordinate
+varying vec4 fragColor;     // Fragment input attribute: color
+```
+
+_OPENGL_ES2 also defines:_
+```glsl
+precision mediump float;    // OpenGL ES 2.0 optimization, using 16bit floats
+```
+
+_OPENGL_33_
+```glsl
+in vec2 fragTexCoord;       // Fragment input attribute: texture coordinate
+in vec4 fragColor;          // Fragment input attribute: color
+out vec4 finalColor;        // Fragment output: color
+```
+
+NOTE: On _OPENGL_ES2 and OPENGL_21_ we use the default built-in fragment output `gl_FragColor` (same as the explicitly defined `finalColor`).