Adobe Reader Lite is a desktop application that allows you to view and edit PDF files. This PDF viewer is independent from Adobe Reader DC and other programs developed by Adobe. This version of Adobe Reader is compatible with Windows XP, Windows 7, and Windows 8 only. At 16.6 megabytes, it is a lightweight program that you can download for personal and professional use. Open a PDF file (any file) in Adobe Reader. Go to EditPreferences. In the Preferences window, click the ‘Accessibility’ tab and enable the ‘Replace Document Colors’ option. Next, select ‘Use High-Contrast Colors’ and select a color scheme from the presets available. The basic Adobe Reader is available for free on the Adobe’s website that anyone can download and use to view PDF files. The Adobe Reader Lite is a bloat-free and lighter version of the Adobe’s famous PDF viewer but with the essential features stripped away. Adobe Acrobat is available in two versions: Standard and Pro. Didn't you find night mode in Adobe Reader? But there is a catch. Yes you can enable night mode in Adobe Reader by following some steps. Use the PostScript Options panel of the Advanced Print Setup dialog box to set options for a particular PostScript printer. These options include how to handle nonresident printer fonts and whether to download Asian fonts. If a PDF contains device-dependent settings, such as halftones and transfer functions, these settings can be sent in the PostScript output to override the default settings.

1. Adobe Reader X Update
2. Adobe Reader X Installer
3. Adobe Acrobat Reader Light
4. Adobe Reader X Not Responding
5. Adobe Reader X Typewriter Tool

A PDF file is one of the most popular portable document formats that is developed by Adobe. It is a platform-independent document that can be carried anywhere. However, a PDF file is able to save text, image, graphics, hyperlinks, etc. and it can be viewed and printed on any platforms. It is also able to add password protection, highlight, and comments. PDF files may contain lengthy documents that are difficult to read. So, with the help of the highlight feature of Adobe Reader, users can organize their notes and makes it easier to find crucial information. But, sometimes it has been noticed that many people can’t highlight PDF in Adobe Reader due to many reasons.

So, in this post, we will discuss the reason behind this problem. Along with this, we will provide you the reliable solution provided by SysTools to unlock PDF security.

Adobe Reader X Update

“I am reviewing a magazine that is downloaded in PDF file format. I want to highlight some important lines in it. But, I have found that the Adobe Acrobat highlight tool not working. It does not give me permissions to highlight text in PDF files. Does anyone know how to enable highlight option in Adobe Reader?”

Why Users Can’t Highlight PDF in Adobe Reader?

There are many situations where users are unable to use highlight text in PDF or add comments on it. Some of the most common cases are discussed below:

(a) A Scanned PDF document containing no real text: When Adobe acrobat highlight tool is not working, then it is possible that your PDF file is likely a scanned file that containing no any real text.

(b) Secured or protected document: The security settings of the PDF document clearly restrict you to add the comment on PDF document. In this setting, the author or distributor of the PDF-file does not allow you to add comments to it.

(c) Encrypted PDF document: If some security settings such as password or certificate are added on a PDF file, then the PDF document becomes encrypted, which restrict to make any changes on PDF file. Thus, users can’t highlight PDF in Adobe reader to encrypted PDF documents.

How to Enable Highlight Option in Adobe Reader?

Two methods can be followed when the Adobe Acrobat highlight tool is not working. These are:

1- Online method

2- Offline method

Online Solution: When users can’t highlight PDF in Adobe Reader they can use an online solution. There are several online methods available but most of the tools have various limitations, so these are not widely used. The online methods work fine, but these are inaccessible in case of poor or unstable internet connection. Takes a long time to remove security and enable highlighting in PDF, which may result in data loss. With the help of an online solution, you can work with only one PDF file at a time. The main problem with online tools is that you have to upload your confidential or crucial data on the server. It is a quite risky task as there are chances of a data hack.

Offline Solution: As it is discussed above, there are many limitations with online tools. Thus, to overcome all these problems, users are looking for a reliable solution. Moreover, sometimes users don’t know how to enable highlight options in Adobe Reader either because of technical issues or due to any other reason. Therefore, to deal with such problems, one can use PDF Security Unlock software. It is a simple and reliable application that is available on the internet and can be easily installed on your system.

This tool is very useful to fix the issue can’t highlight PDF in Adobe Reader. By this utility, users canremove restrictions from PDF which helps them to add comments and highlight text on the PDF. This offline software is compatible to work with both Windows and Mac platform. Moreover, there are many more advantages integrated with this application and its features.

1- Allows to save or print unlocked PDF files

2- Gives option to keep the source PDF file password in the output file

3- Support to remove 128 / 256 bit encryption from PDF

Adobe Reader X Installer

4- Compatible with different versions of PDF files created by different versions of Adobe Acrobat

Now, in order to enable highlight text in PDF documents follow the below steps:

• At first, install and run the software to enable permissions to highlight secured PDF

Adobe Acrobat Reader Light

• Then, add PDF files to the software for eliminating the restrictions from it

• Now, click on the Change button and select the destination location

• Finally, click on Unlock button & enable highlight text in PDF

• Finally, the software will display the process completion message

By following these above steps the user can successfully enable the permissions to highlight secured PDF files.

Adobe Reader X Not Responding

Wrapping Up

Adobe Reader X Typewriter Tool

In this blog, we have discussed how to enable highlight option in Adobe Reader. Along with these reasons due to which users can’t highlight PDF in Adobe Reader is also covered. We have also mentioned both online and offline solutions which can be easily used when the user is unable to use highlight text in PDF. As, online tools have some limitations, so it is recommended to use an effective professional tool for enabling the permissions to highlight secured PDF file.