diff --git a/doc/limitations.md b/doc/limitations.md
index 72e4370..dcba8ba 100644
--- a/doc/limitations.md
+++ b/doc/limitations.md
@@ -4,16 +4,18 @@
 
 # Nameof Type
 
+* To check is nameof_type supported compiler use macro `NAMEOF_TYPE_SUPPORTED` or constexpr constant `nameof::is_nameof_type_supported`.
+
 * This library uses a compiler-specific hack (based on `__PRETTY_FUNCTION__` / `__FUNCSIG__`), which works on Clang >= 5, MSVC >= 15.3 and GCC >= 7.
 
 * Nameof type returns compiler-specific type name.
 
-* In all cases, reference and cv-qualifiers are ignored by `nameof_type` (that is, `nameof_type<const T&>() == nameof_type<T>()`).
-
-* If you need detailed name of full type, use `nameof_full_type`.
+* If argument does not have name, occurs the compilation error `"Expression does not have a name."`.
 
 # Nameof Enum
 
+* To check is nameof_enum supported compiler use macro `NAMEOF_ENUM_SUPPORTED` or constexpr constant `nameof::is_nameof_enum_supported`.
+
 * This library uses a compiler-specific hack (based on `__PRETTY_FUNCTION__` / `__FUNCSIG__`), which works on Clang >= 5, MSVC >= 15.3 and GCC >= 9.
 
 * Enum can't reflect if the enum is a forward declaration.
diff --git a/doc/reference.md b/doc/reference.md
index dfb61f0..f63d577 100644
--- a/doc/reference.md
+++ b/doc/reference.md
@@ -14,6 +14,16 @@
 * [`NAMEOF_TYPE_EXPR` macro that obtains string name type of expression, reference and cv-qualifiers are ignored.](#NAMEOF_TYPE_EXPR)
 * [`NAMEOF_FULL_TYPE_EXPR` macro that obtains string name full type of expression, with reference and cv-qualifiers.](#NAMEOF_FULL_TYPE_EXPR)
 
+## Synopsis
+
+* Before use, read the [limitations](limitations.md) of functionality.
+
+* All functions `constexpr` and `noexcept`.
+
+* To check is nameof_type supported compiler use macro `NAMEOF_TYPE_SUPPORTED` or constexpr constant `nameof::is_nameof_type_supported`.
+
+* To check is nameof_enum supported compiler use macro `NAMEOF_ENUM_SUPPORTED` or constexpr constant `nameof::is_nameof_enum_supported`.
+
 ## `NAMEOF`
 
 * Macro that obtains simple (unqualified) string name of variable, function, macro.