diff --git a/DocumentOperator.Domain/Models/ValueObjects/AnnotationType.cs b/DocumentOperator.Domain/Models/ValueObjects/AnnotationType.cs
new file mode 100644
index 0000000..4ae3a70
--- /dev/null
+++ b/DocumentOperator.Domain/Models/ValueObjects/AnnotationType.cs
@@ -0,0 +1,32 @@
+namespace DocumentOperator.Domain.Models.ValueObjects;
+
+/// <summary>
+/// Supported PDF annotation types
+/// </summary>
+public enum AnnotationType
+{
+    /// <summary>
+    /// Text markup annotation (highlight, underline, strikeout)
+    /// </summary>
+    TextMarkup,
+    
+    /// <summary>
+    /// Free text annotation (text box with visible text)
+    /// </summary>
+    FreeText,
+    
+    /// <summary>
+    /// Sticky note annotation (popup comment icon)
+    /// </summary>
+    StickyNote,
+    
+    /// <summary>
+    /// Circle shape annotation
+    /// </summary>
+    Circle,
+    
+    /// <summary>
+    /// Square shape annotation
+    /// </summary>
+    Square
+}
diff --git a/DocumentOperator.Domain/Models/ValueObjects/TextMarkupStyle.cs b/DocumentOperator.Domain/Models/ValueObjects/TextMarkupStyle.cs
new file mode 100644
index 0000000..82681e9
--- /dev/null
+++ b/DocumentOperator.Domain/Models/ValueObjects/TextMarkupStyle.cs
@@ -0,0 +1,23 @@
+namespace DocumentOperator.Domain.Models.ValueObjects;
+
+/// <summary>
+/// Text markup annotation style (highlight, underline, strikeout)
+/// Maps to DevExpress PdfTextMarkupAnnotationType
+/// </summary>
+public enum TextMarkupStyle
+{
+    /// <summary>
+    /// Highlight text with background color
+    /// </summary>
+    Highlight,
+    
+    /// <summary>
+    /// Underline text
+    /// </summary>
+    Underline,
+    
+    /// <summary>
+    /// Strikeout text (strikethrough)
+    /// </summary>
+    Strikeout
+}