Key Features:
Create and Edit PDF Files:

Adobe Acrobat XI Pro lets you create PDF files from a variety of sources, including Word, Excel, PowerPoint documents, and even images and scanned files.
Edit PDF files: Modify text and images, rearrange pages, add new pages, and remove existing ones.
Combine and merge PDF files:

Acrobat XI Pro lets you combine multiple types of documents into a single PDF file, including Word, Excel, PowerPoint, and other formats.
Files can be easily dragged and dropped into any order you want.
Digital Signatures and Security:

Adding digital signatures helps ensure the authenticity of your documents.
Protect documents with passwords, encryption, and set user permissions (e.g., copy, edit, print).
Manage Forms:

Create and Fill in: Acrobat XI Pro lets you create and fill out interactive forms, such as questionnaires and reports.
Collect and export form data to various formats, such as Excel.
OCR (Optical Character Recognition):

Convert scanned documents to text using the OCR feature, turning scanned images into editable text.
Annotate and add notes:

Add various comments, text annotations, highlights, underlines, and other annotations to PDF files.
Quickly manage document comments and collaborate with colleagues.
Convert PDF files to other formats:

Convert files to various formats, such as Word, Excel, PowerPoint, or HTML.
Adobe PDF Maker allows users to convert documents to PDF directly from within Office programs.
PDF files Compare:

The "Compare Files" feature allows you to quickly and efficiently compare differences between PDF documents, which is especially useful for version control.
Approvals and Reviews:

Users can easily request approval and review of documents from others and incorporate feedback directly into the PDF file.
Insert Image and Multimedia Files:

You can insert images, videos, audio files, and other multimedia elements into PDF documents to make them more interactive.
Licensing and Installation:
Lifetime License: Acrobat XI Pro offers a one-time purchase license,so there is no need to pay a monthly fee or annual subscription. With a one-time purchase, you get perpetual rights to use the software.
Windows and Mac version: The software is available on both Windows and Mac platforms, but it is important to note that Adobe no longer provides official support for Acrobat XI Pro, so compatibility with the latest operating systems is not guaranteed.
Why choose Adobe Acrobat XI Pro?
Adobe Acrobat XI Pro is an ideal choice for those who want to perform more advanced operations with PDF files, such as editing, converting documents, adding signatures, or creating interactive forms.
If you do not need the latest versions and updates, and want a powerful PDF editor with a single, lifetime license, then Acrobat XI Pro can be a cost-effective solution.
Note: Since Acrobat XI Pro is an outdated version, Adobe no longer supports it, so if it is important for you to use the latest features and security updates, you should consider the latest versions (e.g. Adobe Acrobat Pro DC).