diff --git a/src/ui/Features/Shared/PickSubtitleFormat/PickSubtitleFormatViewModel.cs b/src/ui/Features/Shared/PickSubtitleFormat/PickSubtitleFormatViewModel.cs
index 188e9788346..37a34f62802 100644
--- a/src/ui/Features/Shared/PickSubtitleFormat/PickSubtitleFormatViewModel.cs
+++ b/src/ui/Features/Shared/PickSubtitleFormat/PickSubtitleFormatViewModel.cs
@@ -213,6 +213,8 @@ private void ShowTextPreview(string text, SubtitleFormat? format)
             SourceHighlighter = highlighter,
             IsReadOnly = true,
             ShowLineNumbers = true,
+            CornerRadius = new CornerRadius(7),
+            ClipToBounds = true,
             VerticalAlignment = VerticalAlignment.Stretch,
             HorizontalAlignment = HorizontalAlignment.Stretch,
             FontFamily = new FontFamily("Courier New, Consolas, monospace"),