diff --git a/Userland/Libraries/LibGUI/TextDocument.cpp b/Userland/Libraries/LibGUI/TextDocument.cpp
index 0b6e166058..2fbd5b0424 100644
--- a/Userland/Libraries/LibGUI/TextDocument.cpp
+++ b/Userland/Libraries/LibGUI/TextDocument.cpp
@@ -42,10 +42,11 @@ TextDocument::TextDocument(Client* client)
     };
 }
 
-bool TextDocument::set_text(StringView text, AllowCallback allow_callback)
+bool TextDocument::set_text(StringView text, AllowCallback allow_callback, IsNewDocument is_new_document)
 {
     m_client_notifications_enabled = false;
-    m_undo_stack.clear();
+    if (is_new_document == IsNewDocument::Yes)
+        m_undo_stack.clear();
     m_spans.clear();
     m_folding_regions.clear();
     remove_all_lines();
@@ -99,7 +100,8 @@ bool TextDocument::set_text(StringView text, AllowCallback allow_callback)
     clear_text_guard.disarm();
 
     // FIXME: Should the modified state be cleared on some of the earlier returns as well?
-    set_unmodified();
+    if (is_new_document == IsNewDocument::Yes)
+        set_unmodified();
     return true;
 }
 
@@ -1057,31 +1059,24 @@ DeprecatedString InsertLineCommand::action_text() const
     return action_text_builder.to_deprecated_string();
 }
 
-ReplaceAllTextCommand::ReplaceAllTextCommand(GUI::TextDocument& document, DeprecatedString const& text, GUI::TextRange const& range, DeprecatedString const& action_text)
+ReplaceAllTextCommand::ReplaceAllTextCommand(GUI::TextDocument& document, DeprecatedString const& text, DeprecatedString const& action_text)
     : TextDocumentUndoCommand(document)
     , m_original_text(document.text())
     , m_new_text(text)
-    , m_range(range)
     , m_action_text(action_text)
 {
 }
 
 void ReplaceAllTextCommand::redo()
 {
-    m_document.remove(m_range);
-    m_document.set_all_cursors(m_range.start());
-    auto new_cursor = m_document.insert_at(m_range.start(), m_new_text, m_client);
-    m_range.set_end(new_cursor);
-    m_document.set_all_cursors(new_cursor);
+    m_document.set_all_cursors({ 0, 0 });
+    m_document.set_text(m_new_text, AllowCallback::Yes, TextDocument::IsNewDocument::No);
 }
 
 void ReplaceAllTextCommand::undo()
 {
-    m_document.remove(m_range);
-    m_document.set_all_cursors(m_range.start());
-    auto new_cursor = m_document.insert_at(m_range.start(), m_original_text, m_client);
-    m_range.set_end(new_cursor);
-    m_document.set_all_cursors(new_cursor);
+    m_document.set_all_cursors({ 0, 0 });
+    m_document.set_text(m_original_text, AllowCallback::Yes, TextDocument::IsNewDocument::No);
 }
 
 bool ReplaceAllTextCommand::merge_with(GUI::Command const&)
diff --git a/Userland/Libraries/LibGUI/TextDocument.h b/Userland/Libraries/LibGUI/TextDocument.h
index 8380e71bcf..74db33db0b 100644
--- a/Userland/Libraries/LibGUI/TextDocument.h
+++ b/Userland/Libraries/LibGUI/TextDocument.h
@@ -74,7 +74,11 @@ public:
 
     void set_spans(u32 span_collection_index, Vector<TextDocumentSpan> spans);
 
-    bool set_text(StringView, AllowCallback = AllowCallback::Yes);
+    enum class IsNewDocument {
+        No,
+        Yes,
+    };
+    bool set_text(StringView, AllowCallback = AllowCallback::Yes, IsNewDocument = IsNewDocument::Yes);
 
     Vector<NonnullOwnPtr<TextDocumentLine>> const& lines() const { return m_lines; }
     Vector<NonnullOwnPtr<TextDocumentLine>>& lines() { return m_lines; }
@@ -290,19 +294,17 @@ private:
 class ReplaceAllTextCommand final : public GUI::TextDocumentUndoCommand {
 
 public:
-    ReplaceAllTextCommand(GUI::TextDocument& document, DeprecatedString const& new_text, GUI::TextRange const& range, DeprecatedString const& action_text);
+    ReplaceAllTextCommand(GUI::TextDocument& document, DeprecatedString const& new_text, DeprecatedString const& action_text);
     virtual ~ReplaceAllTextCommand() = default;
     void redo() override;
     void undo() override;
     bool merge_with(GUI::Command const&) override;
     DeprecatedString action_text() const override;
     DeprecatedString const& text() const { return m_new_text; }
-    TextRange const& range() const { return m_range; }
 
 private:
     DeprecatedString m_original_text;
     DeprecatedString m_new_text;
-    GUI::TextRange m_range;
     DeprecatedString m_action_text;
 };
 
diff --git a/Userland/Libraries/LibGUI/TextEditor.cpp b/Userland/Libraries/LibGUI/TextEditor.cpp
index a326eb50a2..53313c9713 100644
--- a/Userland/Libraries/LibGUI/TextEditor.cpp
+++ b/Userland/Libraries/LibGUI/TextEditor.cpp
@@ -1800,14 +1800,8 @@ void TextEditor::insert_at_cursor_or_replace_selection(StringView text)
 
 void TextEditor::replace_all_text_without_resetting_undo_stack(StringView text)
 {
-    auto start = GUI::TextPosition(0, 0);
-    auto last_line_index = line_count() - 1;
-    auto end = GUI::TextPosition(last_line_index, line(last_line_index).length());
-    auto range = GUI::TextRange(start, end);
-    auto normalized_range = range.normalized();
-    execute<ReplaceAllTextCommand>(text, range, "GML Playground Format Text");
+    execute<ReplaceAllTextCommand>(text, "GML Playground Format Text");
     did_change();
-    set_cursor(normalized_range.start());
     update();
 }