diff --git a/doc/api.rst b/doc/api.rst
index 24591cd2..8ae48891 100644
--- a/doc/api.rst
+++ b/doc/api.rst
@@ -16,6 +16,7 @@ The {fmt} library API consists of the following parts:
 * :ref:`fmt/chrono.h <chrono-api>`: date and time formatting
 * :ref:`fmt/compile.h <compile-api>`: format string compilation
 * :ref:`fmt/color.h <color-api>`: terminal color and text style
+* :ref:`fmt/os.h <os-api>`: system APIs
 * :ref:`fmt/ostream.h <ostream-api>`: ``std::ostream`` support
 * :ref:`fmt/printf.h <printf-api>`: ``printf`` formatting
 
@@ -57,7 +58,7 @@ participate in an overload resolution if the latter is not a string.
 
 .. _print:
 
-.. doxygenfunction:: print(const S &format_str, Args&&... args)
+.. doxygenfunction:: fmt::print(const S &format_str, Args&&... args)
 .. doxygenfunction:: vprint(string_view, format_args)
 
 .. doxygenfunction:: print(std::FILE *f, const S &format_str, Args&&... args)
@@ -471,6 +472,14 @@ Terminal color and text style
 
 .. doxygenfunction:: bg(detail::color_type)
 
+.. _os-api:
+
+System APIs
+===========
+
+.. doxygenclass:: fmt::ostream
+   :members:
+
 .. _ostream-api:
 
 ``std::ostream`` Support
diff --git a/doc/build.py b/doc/build.py
index 8182ae31..109d8f9d 100755
--- a/doc/build.py
+++ b/doc/build.py
@@ -55,6 +55,7 @@ def build_docs(version='dev', **kwargs):
       ALIASES          += "endrst=\endverbatim"
       MACRO_EXPANSION   = YES
       PREDEFINED        = _WIN32=1 \
+                          __linux__=1 \
                           FMT_USE_VARIADIC_TEMPLATES=1 \
                           FMT_USE_RVALUE_REFERENCES=1 \
                           FMT_USE_USER_DEFINED_LITERALS=1 \
diff --git a/include/fmt/os.h b/include/fmt/os.h
index d1f753a7..73e421ad 100644
--- a/include/fmt/os.h
+++ b/include/fmt/os.h
@@ -373,7 +373,7 @@ struct ostream_params {
 
 static constexpr detail::buffer_size buffer_size;
 
-// A fast output stream which is not thread-safe.
+/** A fast output stream which is not thread-safe. */
 class ostream final : private detail::buffer<char> {
  private:
   file file_;
@@ -410,6 +410,10 @@ class ostream final : private detail::buffer<char> {
     file_.close();
   }
 
+  /**
+    Formats ``args`` according to specifications in ``format_str`` and writes
+    the output to the file.
+   */
   template <typename S, typename... Args>
   void print(const S& format_str, Args&&... args) {
     format_to(detail::buffer_appender<char>(*this), format_str,
@@ -418,9 +422,19 @@ class ostream final : private detail::buffer<char> {
 };
 
 /**
-  Opens a file for writing. Supported parameters passed in `params`:
-  * ``<integer>``: Output flags (``file::WRONLY | file::CREATE`` by default)
+  \rst
+  Opens a file for writing. Supported parameters passed in *params*:
+
+  * ``<integer>``: Flags passed to `open
+    <https://pubs.opengroup.org/onlinepubs/007904875/functions/open.html>`_
+    (``file::WRONLY | file::CREATE`` by default)
   * ``buffer_size=<integer>``: Output buffer size
+
+  **Example**::
+
+    auto out = fmt::output_file("guide.txt");
+    out.print("Don't {}", "Panic");
+  \endrst
  */
 template <typename... T>
 inline ostream output_file(cstring_view path, T... params) {