Underline

Underline helps you emphasize or mark important text in PDF documents. It provides the tools you need to add underline formatting to selected text during PDF editing, making your work more efficient and helping you accomplish tasks with ease. With Underline, you can apply underlines from the editing toolbar, use a floating toolbar after selecting text, or press Ctrl+U to add or remove the effect, giving you the flexibility to complete your work in the way that best fits your workflow. Whether you're highlighting key content, revising document text, or combining underline with other text styles, Underline helps you stay productive. It applies only to selected text, requires editable text, and scanned PDFs may need OCR first. Choose the documentation below that best matches your needs to learn more.