How to Edit a PDF in Preview on Mac

Preview is macOS's built-in PDF viewer — and it's more capable than most people realize. You don't need Adobe Acrobat or a third-party subscription to handle everyday PDF edits. But "editing a PDF in Preview" covers a range of tasks, and what's possible depends heavily on the type of PDF you're working with and what you're trying to do.

What Preview Actually Lets You Do

Preview's editing tools fall into a few distinct categories. Understanding which bucket your task falls into helps set realistic expectations.

Annotation and markup — This is where Preview genuinely shines. You can:

• Highlight text
• Add comments and sticky notes
• Draw shapes, arrows, and lines
• Sketch freehand with the pencil tool
• Add a text box anywhere on the page

Form filling — If a PDF contains interactive form fields, Preview detects them automatically. You can click into the fields and type directly. This works reliably for standard fillable PDFs.

Signatures — Preview has a built-in signature tool. You can draw a signature with your trackpad, sign on paper and capture it with your camera, or use your iPhone or iPad (via Continuity) to sign and import it directly.

Page management — You can reorder pages by dragging thumbnails in the sidebar, delete pages, rotate pages, and insert pages from another PDF.

What Preview cannot do is reflow or edit the underlying text of a standard PDF. If a sentence has a typo, you can't just click in and fix it the way you would in a Word document. PDFs are not word processors — the text is rendered as a fixed layout, and Preview doesn't have a text-reflow engine.

How to Open the Markup Toolbar

The editing tools aren't visible by default. To access them:

1. Open your PDF in Preview
2. Click View in the menu bar → Show Markup Toolbar, or click the toolbox icon (🧰) near the top right of the window
3. The toolbar appears with tools for text, shapes, signatures, and more

You can also use Shift + Command + A as a keyboard shortcut.

Adding Text to a PDF

There are two situations here, and they work differently.

If the PDF has form fields: Click directly on the field and type. Preview will recognize it as interactive and let you fill it in without any extra steps.

If the PDF has no form fields: Use the Text tool (the "T" icon in the Markup Toolbar). Click anywhere on the page to place a text box, then type your content. You can resize the text box, change the font, size, and color from the formatting options that appear. This doesn't edit the existing text — it places a new text layer on top of the document.

Adding and Managing Signatures

Preview makes signatures straightforward:

1. Open the Markup Toolbar
2. Click the Signature button (the cursive icon)
3. Choose Create Signature
4. Select your input method: trackpad, camera, or iPhone/iPad

Once saved, your signature appears in the dropdown whenever you open that menu. Click it to place it on the page, then drag and resize it to fit. Signatures saved in Preview sync across your Apple devices via iCloud, which is useful if you sign documents regularly.

Rearranging or Deleting Pages

This is one of Preview's more underused features:

• Open the Thumbnails sidebar via View → Thumbnails
• Drag thumbnails to reorder pages
• Right-click a thumbnail to delete, rotate, or insert pages
• To merge PDFs, drag a page thumbnail from one Preview window into another's sidebar

These edits are non-destructive until you save — so if you make a mistake before saving, you can undo with Command + Z.

Saving Your Edits

This is where people sometimes get confused. Preview has two save behaviors:

Save (Command + S) — Overwrites the original file with your edits embedded. This is permanent.

Export as PDF — Creates a new copy with your changes while preserving the original. Go to File → Export as PDF to do this. Recommended if you want a backup of the unedited version.

If you used annotation tools, those edits are baked into the PDF when saved. Other people viewing the file will see your annotations, but they won't be editable in the same way a proper annotation layer in Acrobat would be.

Where Preview Falls Short 🔍

Scanned PDFs are a common stumbling block. If your PDF is a scanned image rather than a text-based document, Preview treats it as a picture — you can annotate on top of it, but can't interact with the "text" at all. OCR (optical character recognition) software is required to make scanned content searchable or editable.

macOS Version Matters

Preview's feature set has evolved across macOS versions. The Continuity-based iPhone signature capture, for example, requires a relatively recent version of macOS paired with a compatible iPhone. Some markup tool behaviors also differ slightly between macOS Ventura, Sonoma, and earlier releases.

If a tool described here isn't visible in your version, checking your macOS version — and whether an update is available — is a reasonable first step.

How far Preview takes you depends on the specific PDF you're working with, what you need to change, and which macOS version you're running. The gap between "I just need to fill in this form" and "I need to rewrite a paragraph" is significant — and that gap determines whether Preview is the right tool for your situation.