How to Add Underlines to Your PDF Online

Quickly highlight key information in your PDFs with PDF2Go

Need to highlight a few key points, emphasize details, or mark notes in a PDF? Underlining text is a simple but powerful way to make information stand out. With PDF2Go, you can do it quickly and easily—no downloads or special software needed!

How to Underline Text in a PDF Online with PDF2Go?

Follow these simple steps to underline text in your PDF:

  1. Upload your PDF to the Edit PDF tool.
    • Optional: If your document is scanned and not displaying correctly, enable the "Optimize preview for scanned documents" option.
  2. Click the "Line" icon in the top toolbar.
  3. Click and drag over the text you want to underline.
    • Optional: Change the line color by going to "Options" and selecting "Front/Line Color."
  4. Repeat the process for any other text you want to underline.
  5. Save your changes by clicking "Save As," then "Save" and download your updated PDF.

Tips for Better Underlining in PDFs

  • Underlining is useful, but too much can make a document look cluttered. Use it sparingly to emphasize the most important details.
  • Choose the right color. A black underline works well for professional reports, while bright colors can help study notes stand out.
  • Try different styles. The Edit PDF tool lets you add dotted or dashed lines for variation.
  • Highlight instead. If underlining doesn't work for your document, consider using the highlight tool to make text more noticeable.

In Conclusion

Underlining in PDFs is a great way to draw attention to key information. With PDF2Go, you can do it in just a few clicks, without installing any software.

Try it today and make your PDFs clearer, more organized, and easier to read!

More Editing Features in PDF2Go!

Underlining text is just one of the many things you can do with PDF2Go's Edit PDF tool. Add text boxes, insert images and shapes, or use the whiteout and highlight tools to refine your document.

But that's not all—PDF2Go offers a full suite of tools to simplify your workflow:

  • ✅ Merge, split, compress, and convert PDFs with ease.
  • ✅ Protect your PDFs with passwords or remove restrictions.
  • ✅ Convert PDFs to PDF/A and validate PDF/A for long-term archiving.
  • ✅ AI-powered tools: Convert Speech to Text, Text to Speech, and PDF to Text (AI OCR) for smarter document management.

Whether you need quick edits or advanced AI-powered features, PDF2Go keeps everything in one place—accessible anytime, anywhere!

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How to Get Started?

Setting up a Teams account is simple.

First, create a regular PDF2Go account and choose a subscription plan that fits your needs. Credits—our digital currency for processing tasks—are shared among all team members, making collaboration seamless.

Setting Up Your Teams Account

With just one admin account, you can create up to three Teams accounts, each supporting up to 25 members.

It's the ideal solution for businesses that want to manage PDF files efficiently while sharing access to premium features.

Follow these steps to create your team:

  1. Log in to your PDF2Go account.
  2. Go to your Dashboard and select Teams.
  3. Click "Create Team" and choose a name.
  4. Invite team members to join.

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