---
title: Annotation Options in the PDF Reader
description: "References within the Reader have several annotation features available. You can highlight, underline, strike through, use the draw/freehand-write tool or add a sticky note. To turn on annotation mode, click \"annotate\" on the upper left hand side of the app:…"
url: "https://about.readcube.com/help-center/annotation-options-in-the-readcube-pdf-reader/"
updated: "2026-02-09"
category: "Read & Annotate"
---

# Annotation Options in the PDF Reader

References within the Reader have several annotation features available.

You can highlight, underline, strike through, use the draw/freehand-write tool or add a sticky note. To turn on annotation mode, click "annotate" on the upper left hand side of the app:

![](https://about.readcube.com/wp-content/uploads/2024/12/image-47-1024x268.png)

With annotation mode active select the option you want to use.

![](https://about.readcube.com/wp-content/uploads/2024/12/image-48-1024x537.png)

With your annotation option selected, click and drag your cursor over the words you'd like to annotate

![](https://about.readcube.com/wp-content/uploads/2024/12/image-49-1024x506.png)

You can also first select the text you want to annotate, right-click on it and then choose an annotation type from the drop-down menu:

![](https://about.readcube.com/wp-content/uploads/2024/12/image-50-1024x599.png)

To delete an unwanted annotation simply click on it and select the trashcan icon option on the top left of the reader. Note, you'll need to have "annotation" mode switched on.

![](https://about.readcube.com/wp-content/uploads/2024/12/image-51-1024x667.png)

All annotations made in the PDF will be visible in the "Notes" section of the top left-hand menu

![](https://about.readcube.com/wp-content/uploads/2024/12/image-52-1024x487.png)