diff --git a/Sources/EasyRichTextUI/ERTTextEditor_AppKit.swift b/Sources/EasyRichTextUI/ERTTextEditor_AppKit.swift
index b052e55..124b00c 100644
--- a/Sources/EasyRichTextUI/ERTTextEditor_AppKit.swift
+++ b/Sources/EasyRichTextUI/ERTTextEditor_AppKit.swift
@@ -12,9 +12,11 @@ import EasyRichText
 
 struct ERTTextEditor<RichText: ERTRichText>: NSViewRepresentable {
     @ObservedObject var editContext: ERTRichTextEditContext<RichText>
+    var customize: ((NSTextView) -> ())?
 
-    init(editContext: ERTRichTextEditContext<RichText>) {
+    init(editContext: ERTRichTextEditContext<RichText>, customize: ((NSTextView) -> ())? = nil) {
         self.editContext = editContext
+        self.customize = customize
     }
 
     func makeCoordinator() -> ERTTextViewDelegate<RichText> {
@@ -42,6 +44,8 @@ struct ERTTextEditor<RichText: ERTRichText>: NSViewRepresentable {
         textView.textStorage?.setAttributedString(editContext.nsAttributedString)
         textView.delegate = context.coordinator
 
+        customize?(textView)
+
         return textView
     }
 
diff --git a/Sources/EasyRichTextUI/ERTTextEditor_UIKit.swift b/Sources/EasyRichTextUI/ERTTextEditor_UIKit.swift
index 9012c46..30a78f6 100644
--- a/Sources/EasyRichTextUI/ERTTextEditor_UIKit.swift
+++ b/Sources/EasyRichTextUI/ERTTextEditor_UIKit.swift
@@ -12,9 +12,11 @@ import EasyRichText
 
 public struct ERTTextEditor<RichText: ERTRichText>: UIViewRepresentable {
     @ObservedObject public var editContext: ERTRichTextEditContext<RichText>
+    var customize: ((UITextView) -> ())?
 
-    public init(editContext: ERTRichTextEditContext<RichText>) {
+    public init(editContext: ERTRichTextEditContext<RichText>, customize: ((UITextView) -> ())? = nil) {
         self.editContext = editContext
+        self.customize = customize
     }
 
     public func makeCoordinator() -> ERTTextViewDelegate<RichText> {
@@ -37,6 +39,8 @@ public struct ERTTextEditor<RichText: ERTRichText>: UIViewRepresentable {
         textView.backgroundColor = .clear
         textView.isScrollEnabled = false
 
+        customize?(textView)
+
         return textView
     }