Extracting Mail IDs from a PDF format manually involves opening the PDF file using a reader like Adobe Acrobat, then scanning through the document to locate email addresses. You can copy and paste them into a separate file, or use the "Find" feature (Ctrl+F or Cmd+F) to search for "@" symbols which are commonly present in email IDs. However, this manual process can be time-consuming and error-prone, especially if the PDF contains numerous pages or if the text is embedded as an image (scanned document), making it unsearchable without OCR (Optical Character Recognition). 

To simplify this task, tools like the Cigati PDF Extractor Tool offer a more efficient solution. This software allows users to automatically extract email addresses from PDF files without the need for manual searching. It supports bulk extraction, saving significant time and effort, and also ensures accuracy by scanning both text and image-based PDFs. Additionally, it preserves the original file structure and supports password-protected PDFs, making it a comprehensive tool for data extraction tasks. Overall, using a professional tool like Cigati PDF Extractor Tool streamlines the process and minimizes the risks of missing or incorrectly copying email addresses.