diff --git a/Easydict/NewApp/Utility/Protocol/ConfigurableService.swift b/Easydict/NewApp/Utility/Protocol/ConfigurableService.swift
index 3bc016300..6d3afe4de 100644
--- a/Easydict/NewApp/Utility/Protocol/ConfigurableService.swift
+++ b/Easydict/NewApp/Utility/Protocol/ConfigurableService.swift
@@ -9,9 +9,11 @@
 import Foundation
 import SwiftUI
 
+/// A service can provide configuration view in setting
 protocol ConfigurableService {
     associatedtype T: View
-
+    
+    /// Items in Configuration Form. Use ServiceStringConfigurationSection or other customize view.
     @ViewBuilder
     func configurationListItems() -> T
 }