Highlight text, add stamps, and use "Night" or "Sepia" modes for comfort.
Modify text, replace images, and update links within the PDF.
Readdle primarily supports the latest version (PDF Expert 3); version 2 may lack the latest security patches.
Ensure your specific macOS version supports this legacy build.
I can then provide specific steps for a secure installation.
Only download from reputable sources or the official Readdle archive to avoid malware or "cracked" files that compromise system security.