How do I annotate a poster PDF without Adobe Acrobat?

On Mac, open the PDF in Preview (it's free and built in), press Shift ⌘ A for the Markup Toolbar, and add sticky notes, text callouts, and arrows. On Windows, open the PDF in Edge — it has a basic drawing pen and text highlight tool in the top bar. For more structured annotation, Smallpdf and PDF24 both run in a browser and let you add sticky notes and shapes without installing anything.

Can a client annotate a poster design without installing software?

Not easily with a PDF or image attachment — they'd need Preview, Acrobat, or a PDF annotator. The approach that skips all that: share the poster as a link (via a tool like Drafty or Markup.io) so your client opens it in any browser, clicks the spot they mean, and leaves a note pinned there. No download, no account, no app to install.

How do I annotate a poster on my phone?

On iPhone, share the exported PNG and open it in Markup — tap the pencil icon in the iOS share sheet. You can draw, add text, and circle elements, then send the annotated image back. On Android, open the PNG in Google Photos and tap Edit → Markup for the same result. For sending feedback to someone else from your phone, a link-based review tool is cleaner — you tap the element, type a note, done, no annotated image to export.

How do I get specific feedback on a poster design instead of vague comments?

Vague feedback ('the font feels off', 'can it be bolder') almost always comes from clients who can't point at what they mean. When the channel is email, they describe instead of showing. Give them a way to click the exact element — the headline, a specific image, the call-to-action box — and leave a note tied to that spot. Pinned, element-anchored comments produce actionable feedback; free-text email replies rarely do.

What file format is best for sharing a poster for annotation?

PDF is the most annotation-friendly format because comment layers survive the file and most review tools support it natively. PNG works well for link-based review tools where the annotation lives server-side, not in the file. Avoid sharing the native Canva or Illustrator file with clients — they almost certainly can't open it, and you don't want them editing the source.

How do I keep all poster revision notes in one place?

The main culprit for scattered notes is the attachment email chain — the client downloads the file, annotates it in their own tool, and sends back a different copy. Repeat three rounds and you're reconciling six files. A shared link means one artifact, all annotations visible in one thread, no version reconciliation. Most dedicated design review tools, including Drafty and Markup.io, work this way.

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How to annotate a poster

Quick answer

To annotate a poster, export it from Canva, Illustrator, or Photoshop as a PNG or PDF, then open it in Preview on Mac (Shift ⌘ A for the markup toolbar) or Adobe Acrobat (Comment panel) and add callout arrows and text notes. To collect feedback from a client, share a link they can pin notes on in any browser — no download, no login.

Step 1

Mark up an exported PNG in Preview or Snipping Tool

Export the poster as a PNG at full resolution — in Canva, click Download → PNG; in Illustrator, File → Export → Export As → PNG; in Photoshop, File → Export → Quick Export as PNG. On Mac, open the PNG in Preview and press Shift ⌘ A to reveal the Markup Toolbar. Use the arrow tool to point at specific elements, the text callout for labeled notes, and the shape tool to circle areas. On Windows, open the PNG in the Snipping Tool and hit Edit, or paste it into Paint and annotate with the pen and text tools. One gotcha: the annotations are baked flat into the image. If a second round of feedback arrives, you're exporting and annotating again — there's no way to reply to or resolve a specific note.

Step 2

Export as PDF and annotate in Acrobat or Preview

PDF annotations travel with the file and are more structured than drawing on a flat image. In Illustrator: File → Save As → Adobe PDF (keep the 'High Quality Print' preset). In Canva: Download → PDF Print. In Preview on Mac, Shift ⌘ A opens the Markup Toolbar — sticky notes, highlights, text callouts, and shapes. In Adobe Acrobat, open the Comment panel (View → Comment) to pin sticky notes anywhere on the page and add replies. For a poster with multiple revision cycles — type adjustment, image swap, bleed check — Acrobat's comment layer is easier to reconcile than re-annotated PNG files. The limitation: your client can't add their own notes unless they also have Acrobat or Preview and know how to use it.

Step 3

Use Canva's comment tool if the file lives in Canva

If the poster was designed in Canva, skip the export step: open the file, click the speech bubble icon in the toolbar, and click the spot you want to flag. Canva pins a numbered comment to that point. You can invite the client by email and they can reply in-thread — but they need a Canva account to comment. Free Canva accounts work, so the friction is lower than asking a client to install Acrobat. The catch: Canva comments don't survive the export — if you hand the client a PDF, they're looking at a flat file with no comment layer. Canva comments live in Canva only, so the client must open the link on their end, not just view the file you sent.

Step 4

Share a review link the client can annotate without any account

The friction point most designers hit: the client can't figure out how to annotate the file you sent. They open the PDF in Chrome's built-in viewer (no annotation tools), or on their phone (no stylus, no toolbar), and email back "the headline font feels a bit heavy" — pointing at nothing in particular. The approach that removes this: share a link the client opens in any browser. They click the element they mean — the headline, the bottom-right logo, the bleed area — and pin a note right there. No downloaded file, no account, no software. Notes come back anchored to the exact spot, in a single thread rather than a reply-all email chain. Both Drafty and Markup.io support this flow; the tradeoff versus Canva comments is that the client sees the exported version, not the live editable file.

The faster way

If the goal is getting your client's notes on the poster — not marking it up yourself — the lowest-friction path is a shared link they annotate in any browser. Drop your exported PNG or PDF into Drafty, copy the link, and send it. Your client clicks the headline that feels off, the logo placement that needs adjusting, the sponsor text that's too small — and pins a note right to that spot. No Canva account, no PDF reader, no re-emailed files. Every note lands in one thread, anchored to the element they clicked, and you can reply and mark it resolved. When the revised version is ready, push it to the same link — the client sees the update without digging through their inbox for a new attachment.

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Questions

How do I annotate a poster PDF without Adobe Acrobat?: On Mac, open the PDF in Preview (it's free and built in), press Shift ⌘ A for the Markup Toolbar, and add sticky notes, text callouts, and arrows. On Windows, open the PDF in Edge — it has a basic drawing pen and text highlight tool in the top bar. For more structured annotation, Smallpdf and PDF24 both run in a browser and let you add sticky notes and shapes without installing anything.
Can a client annotate a poster design without installing software?: Not easily with a PDF or image attachment — they'd need Preview, Acrobat, or a PDF annotator. The approach that skips all that: share the poster as a link (via a tool like Drafty or Markup.io) so your client opens it in any browser, clicks the spot they mean, and leaves a note pinned there. No download, no account, no app to install.
How do I annotate a poster on my phone?: On iPhone, share the exported PNG and open it in Markup — tap the pencil icon in the iOS share sheet. You can draw, add text, and circle elements, then send the annotated image back. On Android, open the PNG in Google Photos and tap Edit → Markup for the same result. For sending feedback to someone else from your phone, a link-based review tool is cleaner — you tap the element, type a note, done, no annotated image to export.
How do I get specific feedback on a poster design instead of vague comments?: Vague feedback ('the font feels off', 'can it be bolder') almost always comes from clients who can't point at what they mean. When the channel is email, they describe instead of showing. Give them a way to click the exact element — the headline, a specific image, the call-to-action box — and leave a note tied to that spot. Pinned, element-anchored comments produce actionable feedback; free-text email replies rarely do.
What file format is best for sharing a poster for annotation?: PDF is the most annotation-friendly format because comment layers survive the file and most review tools support it natively. PNG works well for link-based review tools where the annotation lives server-side, not in the file. Avoid sharing the native Canva or Illustrator file with clients — they almost certainly can't open it, and you don't want them editing the source.
How do I keep all poster revision notes in one place?: The main culprit for scattered notes is the attachment email chain — the client downloads the file, annotates it in their own tool, and sends back a different copy. Repeat three rounds and you're reconciling six files. A shared link means one artifact, all annotations visible in one thread, no version reconciliation. Most dedicated design review tools, including Drafty and Markup.io, work this way.

Keep exploring

How to annotate a design How to annotate a PDF How to annotate an image Design feedback tool

Stop emailing files back and forth.

Share one link. They comment on the exact spot — no account, always the current version.

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