diff --git a/PSPs/drafts/psp-61.md b/PSPs/drafts/psp-61.md
index 8870d3f..be8554c 100644
--- a/PSPs/drafts/psp-61.md
+++ b/PSPs/drafts/psp-61.md
@@ -14,16 +14,16 @@ This proposal aims to define the interface detection standard for WebAssembly sm
 
 ## Motivation
 
-Motivation of this proposal is to provide a standard way for smart contracts to detect the interface of the smart contract they are interacting with. 
-This is useful for smart contracts which interact with other smart contracts, as it allows them to detect the interface of the smart contract they are interacting with and adjust their behavior accordingly, 
+Motivation of this proposal is to provide a standard way for smart contracts to detect the interface of the smart contract they are interacting with.
+This is useful for smart contracts which interact with other smart contracts, as it allows them to detect the interface of the smart contract they are interacting with and adjust their behavior accordingly,
 without having any ABI of that contracts.
 
 ## Specification
 
 ### 1. Interface ID (TRAIT_ID)
 
-Interface ID is a 4-byte identifier of the interface, stored in `u32` big-endian format. It is calculated as the first 4 bytes of the blake2b hash of the string, 
-that is concatenation of all messages, sorted in lexicographical order. Such as in the example below:
+Interface ID is a 4-byte identifier of the interface, stored in `u32` big-endian format. It is calculated as the first 4 bytes of the blake2b hash of the string,
+that is concatenation of all message selectors, sorted in lexicographical order. Such as in the example below:
 
 ```rust
 message_selectors.sort_unstable();
@@ -31,7 +31,7 @@ message_selectors.sort_unstable();
 let trait_id = ::ink_ir::Selector::compute(&message_selectors.join("").into_bytes()).into_be_u32();
 ```
 
-Where `message_selectors` is a vector of all message selectors of the interface in the format `<trait-name>::<message-name>`, 
+Where `message_selectors` is a vector of all message selectors of the interface in the format `<trait-name>::<message-name>`,
 and `::ink_ir::Selector::compute` that computes the BLAKE-2 256-bit based selector from the given input bytes.
 
 ```rust
@@ -136,18 +136,21 @@ use ink::prelude::{
     vec::Vec,
 };
 
+/// User-defined interfaces (not part of PSP, but provided to show the full implementation
 pub trait PSP61Internal {
     fn _interfaces(&self) -> Vec<u32> {
         vec![]
     }
 }
 
+/// OB interfaces (not part of PSP, but provided to show the full implementation
 pub trait PSP61InternalOB {
     fn _interfaces_ob(&self) -> Vec<u32> {
         vec![]
     }
 }
 
+/// Implementation of PSP61
 pub trait PSP61Impl: PSP61Internal + PSP61InternalOB {
     fn supports_interface(&self, interface_id: u32) -> bool {
         self._interfaces().contains(&interface_id) || self._interfaces_ob().contains(&interface_id)
@@ -160,7 +163,7 @@ pub trait PSP61Impl: PSP61Internal + PSP61InternalOB {
     }
 }
 
-/// Macro for implementing PSP61Internal trait
+/// Macro for implementing PSP61Internal trait, not part of PSP, provided for full example
 #[macro_export]
 macro_rules! supported_interfaces {
     ($contract:ident => $($interface_id:expr),*) => {
@@ -176,7 +179,7 @@ macro_rules! supported_interfaces {
 }
 ```
 
-And implementation of this trait is done via `#[openbrush::implementation]` macro:
+And implementation of this trait in OB is done via `#[openbrush::implementation]` macro:
 ```rust
 // examples/psp61/lib.rs
 #![cfg_attr(not(feature = "std"), no_std, no_main)]