---
title: "Explore annotation types in MAUI SDK"
canonical_url: "https://www.nutrient.io/guides/maui/annotations/introduction-to-annotations/supported-types/"
md_url: "https://www.nutrient.io/guides/maui/annotations/introduction-to-annotations/supported-types.md"
last_updated: "2026-05-23T00:08:18.135Z"
description: "Discover supported annotation types in MAUI SDK, including highlights, signatures, and media annotations for seamless document handling."
---

# Mastering annotation types in MAUI SDK

Nutrient Web SDK supports all common annotation types:

- Link

- Highlight, Underline, Strikeout, Squiggle

- Text

- Callout

- Ink

- Ellipse, Rectangle, Line, Polyline, Polygon

- Note

- Widget (requires the Form Filling component)

- Image

- Stamp

- Redaction (requires the Redaction component)

- Media

These are standard annotations (as defined in the PDF Reference) that can be read and written by many apps, such as Adobe Acrobat and Apple Preview.

## Signature annotations

Ink and image annotations may be used as signatures. Refer to [Signatures](https://www.nutrient.io/guides/maui/signatures/electronic-signatures.md) to learn more. Using the signature tool requires the Electronic Signatures component.
---

## Related pages

- [What are PDF annotations?](/guides/maui/annotations/introduction-to-annotations/what-are-annotations.md)