diff --git a/src/AbstractImage.h b/src/AbstractImage.h
index 3dea087db..815371bfe 100644
--- a/src/AbstractImage.h
+++ b/src/AbstractImage.h
@@ -44,6 +44,7 @@ class MAGNUM_EXPORT AbstractImage {
          */
 
         /** @brief Color components */
+        /** @todo Support *_INTEGER types */
         enum class Components: GLenum {
             #ifndef MAGNUM_TARGET_GLES
             /**
diff --git a/src/Color.h b/src/Color.h
index 7dd384a1f..abfafa345 100644
--- a/src/Color.h
+++ b/src/Color.h
@@ -140,6 +140,8 @@ is always in range in range @f$ [0.0, 360.0] @f$, saturation and value in
 range @f$ [0.0, 1.0] @f$.
 
 @see Color4
+
+@todo Signed normalization to [-1.0, 1.0] like in OpenGL?
 */
 template<class T> class Color3: public Math::Vector3<T> {
     public:
diff --git a/src/Math/Math.h b/src/Math/Math.h
index 4f6d641a2..21191b360 100644
--- a/src/Math/Math.h
+++ b/src/Math/Math.h
@@ -104,6 +104,8 @@ float a = normalize<float>('\127');
 // b = 1.0f
 float b = normalize<float, char>('\127');
 @endcode
+
+@todo Signed normalization to [-1.0, 1.0] like in OpenGL?
 */
 template<class FloatingPoint, class Integral> inline constexpr typename std::enable_if<std::is_floating_point<FloatingPoint>::value && std::is_integral<Integral>::value, FloatingPoint>::type normalize(Integral value) {
     return (FloatingPoint(value)-FloatingPoint(std::numeric_limits<Integral>::min()))/
@@ -118,6 +120,8 @@ integral type.
 
 @note For best precision, `FloatingPoint` type should be always larger that
 resulting `Integral` type (e.g. `double` to `int`, `long double` to `long long`).
+
+@todo Signed normalization to [-1.0, 1.0] like in OpenGL?
 */
 template<class Integral, class FloatingPoint> inline constexpr typename std::enable_if<std::is_floating_point<FloatingPoint>::value && std::is_integral<Integral>::value, Integral>::type denormalize(FloatingPoint value) {
     return             std::numeric_limits<Integral>::min() +