diff --git a/src/api/call_fn.rs b/src/api/call_fn.rs
index 33549155..6f72e1b7 100644
--- a/src/api/call_fn.rs
+++ b/src/api/call_fn.rs
@@ -86,7 +86,11 @@ impl Engine {
     ///
     /// Not available under `no_function`.
     ///
-    /// # WARNING
+    /// # WARNING - Low Level API
+    ///
+    /// This function is very low level.
+    ///
+    /// ## Arguments
     ///
     /// All the arguments are _consumed_, meaning that they're replaced by `()`.
     /// This is to avoid unnecessarily cloning the arguments.
diff --git a/src/api/deprecated.rs b/src/api/deprecated.rs
index 1d0f4a64..1bcd23b3 100644
--- a/src/api/deprecated.rs
+++ b/src/api/deprecated.rs
@@ -125,7 +125,11 @@ impl Engine {
     ///
     /// This method will be removed in the next major version.
     ///
-    /// # WARNING
+    /// # WARNING - Low Level API
+    ///
+    /// This function is very low level.
+    ///
+    /// ## Arguments
     ///
     /// All the arguments are _consumed_, meaning that they're replaced by `()`.
     /// This is to avoid unnecessarily cloning the arguments.
@@ -221,7 +225,11 @@ impl Dynamic {
 impl NativeCallContext<'_> {
     /// Call a function inside the call context.
     ///
-    /// # WARNING
+    /// # WARNING - Low Level API
+    ///
+    /// This function is very low level.
+    ///
+    /// ## Arguments
     ///
     /// All arguments may be _consumed_, meaning that they may be replaced by `()`. This is to avoid
     /// unnecessarily cloning the arguments.
@@ -273,7 +281,11 @@ impl FnPtr {
     ///
     /// This method will be removed in the next major version.
     ///
-    /// # WARNING
+    /// # WARNING - Low Level API
+    ///
+    /// This function is very low level.
+    ///
+    /// ## Arguments
     ///
     /// All the arguments are _consumed_, meaning that they're replaced by `()`.
     /// This is to avoid unnecessarily cloning the arguments.
diff --git a/src/api/register.rs b/src/api/register.rs
index 85288e00..a7f19301 100644
--- a/src/api/register.rs
+++ b/src/api/register.rs
@@ -154,7 +154,7 @@ impl Engine {
     ///
     /// This function is very low level.  It takes a list of [`TypeId`][std::any::TypeId]'s indicating the actual types of the parameters.
     ///
-    /// # Arguments
+    /// ## Arguments
     ///
     /// Arguments are simply passed in as a mutable array of [`&mut Dynamic`][crate::Dynamic],
     /// The arguments are guaranteed to be of the correct types matching the [`TypeId`][std::any::TypeId]'s.
diff --git a/src/func/native.rs b/src/func/native.rs
index b0305cc7..e5cf5b8e 100644
--- a/src/func/native.rs
+++ b/src/func/native.rs
@@ -230,7 +230,11 @@ impl<'a> NativeCallContext<'a> {
     /// If `is_method_call` is [`true`], the first argument is assumed to be the `this` pointer for
     /// a script-defined function (or the object of a method call).
     ///
-    /// # WARNING
+    /// # WARNING - Low Level API
+    ///
+    /// This function is very low level.
+    ///
+    /// # Arguments
     ///
     /// All arguments may be _consumed_, meaning that they may be replaced by `()`. This is to avoid
     /// unnecessarily cloning the arguments.
diff --git a/src/module/mod.rs b/src/module/mod.rs
index 47d12f14..841c5d2b 100644
--- a/src/module/mod.rs
+++ b/src/module/mod.rs
@@ -741,7 +741,7 @@ impl Module {
     ///
     /// This function is very low level.
     ///
-    /// # Arguments
+    /// ## Arguments
     ///
     /// A list of [`TypeId`]'s is taken as the argument types.
     ///
diff --git a/src/types/fn_ptr.rs b/src/types/fn_ptr.rs
index e0476717..7475b7ef 100644
--- a/src/types/fn_ptr.rs
+++ b/src/types/fn_ptr.rs
@@ -204,7 +204,7 @@ impl FnPtr {
     ///
     /// This function is very low level.
     ///
-    /// # Arguments
+    /// ## Arguments
     ///
     /// All the arguments are _consumed_, meaning that they're replaced by `()`.
     /// This is to avoid unnecessarily cloning the arguments.