Highlight, underline and strikethrough text

Mark up existing text in a PDF with highlights, underlines, strikethroughs and squiggly lines.

Applies to A recent Chrome, Edge, Safari or Firefox

Markup tools let you annotate text that is already in the PDF — select a word, sentence or paragraph and apply a highlight or underline in one tap.

Apply a highlight

Choose Highlight from the tool row.
Click and drag across the text.
Select the annotation to change its colour in the properties panel.
The Markup tool row and the highlighted effective date

All markup tools work the same way — select the tool, drag across text:

Tool	What it does
Highlight	Fills behind the text with a semi-transparent colour
Underline	Draws a solid line below the text
Strikethrough	Draws a line through the middle of the text
Squiggly	Draws a wavy underline (often used for spelling corrections)

Click the annotation to select it, then use the properties panel to change colour and opacity.

Select it, then tap Delete in the action bar (mobile) or press the Delete key (desktop).

Markup annotations are saved as standard PDF highlight/underline annotations and will be visible in Adobe Acrobat, Preview and other PDF apps.