# How to resize an image in Photoshop on Mac: step by step for Photoshop 27.6

> Learn how to resize an image in Photoshop on Mac with Image > Image Size. Keep proportions, check Resample and save a copy safely.

URL: https://www.lazur.app/how-to/resize-an-image-in-photoshop
Updated: 2026-11-08

To resize an image in Photoshop on Mac, open Image > Image Size, enter a new width or height, keep the chain-link icon on, and click OK. Keep Resample checked to change the pixel count, and use File > Save As so your original file stays intact.

## Quick answer

- Open the file, then go to Image > Image Size and read the current pixel dimensions.
- Keep the chain-link icon switched on so the width and height change together.
- Keep Resample checked to change the pixel count. Greyed-out pixel fields mean it is off.
- Save a copy with File > Save As before you resize, or use File > Export As for a smaller file.

Applies to: Photoshop 27.6 on macOS 14.0 or later, desktop and web. Time: 10 min. Difficulty: Easy.

## What you need

- Photoshop desktop 27.6, or the version that matches Adobe's current release
- macOS 14.0 or later for Photoshop 27.6
- A Creative Cloud plan that includes Photoshop, for the web version only
- A copy of the original image so you can compare sizes

## How to Resize an image in Photoshop on Mac in Photoshop on a Mac

1. **Open the file in Photoshop.** (File > Open) Shortcut: ⌘O. Open Photoshop, then choose File > Open and select the image. If you are not sure about the change, drag a duplicate of the file into the window and work on that instead. Tip: The document title bar shows the file name and the current zoom level.
2. **Open the Image Size dialog.** (Image > Image Size) With the image active, choose Image > Image Size. The dialog opens over the document and shows the current pixel dimensions at the top. Tip: If nothing happens, click the document window first so Photoshop makes it the active file.
3. **Note the current size.** Read the pixel width and height before you change anything. Write them down. You can return to the starting values if the result is wrong.
4. **Choose a unit for width.** Open the unit menu next to Width. Choose Pixels for screen work. Choose Inches or Centimeters when the print size matters. Percent scales from the original size. Tip: Pixel Dimensions describe the file. Document Size describes the print. They are different numbers.
5. **Or pick a Fit To preset.** Open the Fit To menu if you need a standard size. A preset fills in both fields for you. Read the numbers afterward, because a preset may not match your exact need.
6. **Keep the chain-link icon on.** Make sure the chain-link icon between Width and Height is switched on. Type the new width, press Tab, and watch the height follow. The proportions stay the same. Tip: Press Tab to commit a value. Clicking another field also works.
7. **Keep Resample checked.** Tick Resample if you want the pixel count to change. Leave the resolution alone unless you have a print target. If the pixel fields are greyed out, Resample is off. Tip: With Resample off, the pixel count is locked. Tick it again, set the units to pixels, then retype the width.
8. **Click OK and check the result.** (View > Actual Pixels) Shortcut: ⌘1. Click OK to apply the change. Zoom to actual pixels with ⌘1, then look at edges and small text. If the result looks wrong, press ⌘Z to undo and try a smaller change. Tip: Check text and thin lines first. They show softness fastest after an enlargement.
9. **Save a copy with Save As.** (File > Save As) Shortcut: ⇧⌘S. Choose File > Save As and give the file a new name. Keep the PSD for future edits. Your original file stays on disk unchanged. Tip: Name the copy with its size or its purpose, such as a web version or a print version.
10. **Export a smaller file for sharing.** (File > Export As) When you need a smaller JPG or PNG for sharing, choose File > Export As. Pick the format, check the size settings, and save the file to a folder you can find later. Tip: Export As leaves the working document open and untouched, so you can export other sizes later.

## Check your Photoshop version before you start

The steps on this page match Photoshop 27.6, the newest desktop release this guide was checked against. CG Channel reports that Adobe released it on April 28, 2026, and that it needs macOS 14.0 or later. Some sites list newer build numbers, so compare yours with Adobe's own release notes. To see your version, choose Photoshop > About Photoshop. A longer walkthrough is in [how to check your Photoshop version](https://www.lazur.app/how-to/check-your-photoshop-version-in-photoshop).

The coverage of Photoshop 27.6 does not mention changes to the Image Size dialog. The menu path below is the one Adobe describes on its resize page. If your screen looks different, the menu name is the thing to match.

## How the Image Size dialog works in Photoshop

Image > Image Size opens a dialog with two halves. The top section, Pixel Dimensions, shows the pixel width and height of your file. The lower section, Document Size, controls the printed size and the resolution in pixels per inch. Screen work lives in the top half. Print work depends on both halves.

Each width and height field takes a unit. Pixels change the file itself. Inches and centimeters set the print size. Percent scales the image from its original size. The Fit To menu offers common presets, so you can pick a size without typing a number.

The chain-link icon sits between Width and Height. When it is on, changing one number changes the other, so the proportions hold. Turn it off only when you want to stretch the picture on purpose. For photos, stretching almost always looks wrong.

## Resample: when Photoshop changes the pixel count

Resample decides whether Photoshop adds or removes pixels. With Resample checked, a smaller size throws pixels away. A larger size creates new pixels from the pixels around them. With Resample unchecked, the pixel count stays locked, and changing the size changes only the resolution.

| Resample | What changes | Use it when |
| --- | --- | --- |
| Checked, smaller | Pixel count drops | Preparing files for email, social posts or a website |
| Checked, larger | Pixel count grows with estimated pixels | Small increases only, and check edges closely |
| Unchecked | Resolution in pixels per inch changes, pixel count stays | You only need a different print resolution |

_What Resample does to your numbers_

Greyed-out pixel fields are the most common problem people report. An Adobe Community thread about Photoshop CC describes this exact case. The accepted answer is simple. Tick Resample again, set the units to pixels, and retype the width. If you only want a new print resolution, leave Resample off on purpose.

Adobe's wording on Resample is not fully clear. Unchecking it can lock the pixel count, and it can also change print size. Test the change on a copy of your file before you rely on it for a deadline.

## Why enlarging looks worse than shrinking

Shrinking removes detail, but the smaller file usually looks clean. Enlarging asks Photoshop to invent detail the camera never captured. Edges soften, and fine texture turns smooth. Text and thin lines show the damage first, so check them before anything else.

The safest fix is to start from the largest version you have. A small web image blown up for print will never match a file captured at full size. If a client insists on a big enlargement, put the limit in writing before you start. Then zoom to actual pixels and look before you export.

> **Enlarge less than you think:** Every enlargement adds guessed pixels. Make the smallest change that still works for the use, and keep the bigger original on disk.

## Free Transform scales one layer, not the whole file

Some people reach for Free Transform with ⌘T instead of Image Size. Free Transform scales the selected layer inside the document. The canvas keeps its size. Hold Shift while you drag to keep proportions, or type exact values in the options bar. Use Image Size when the whole file needs a new size.

## Save As or Export As in Photoshop

Resizing changes the open document, so save with care. Adobe's resize guide recommends File > Save As before any permanent change. That keeps the original on disk. Press ⇧⌘S to reach it fast, then give the new file a clear name that says its size or its purpose.

For a smaller copy meant to share, use File > Export As. It writes a new JPG or PNG and leaves your working document alone. A common pattern is one PSD for editing and one exported file for sending.

> **Save is not Save As:** Pressing ⌘S on a file you opened saves over it. Use Save As first, or press ⌘Z to undo before you close the document.

![Designer working on a Mac laptop while learning how to resize an image in Photoshop on Mac](https://images.lazur.app/content-images/howto/resize-an-image-in-photoshop/how-to-resize-an-image-in-photoshop-1-254934.jpg)

## Resize an image in Photoshop on the web

If Photoshop is not installed on your Mac, Photoshop on the web (Beta) runs in a browser. Adobe's resize page describes the same Image > Image Size route there, with the link icon highlighted. You need a Creative Cloud plan that includes Photoshop.

The browser version has firm limits. Adobe lists a 40MB maximum file size and an 8,000 x 8,000 pixel maximum. It takes one file at a time. If you see the error Image exceeds maximum dimensions, resize the file smaller and upload it again.

Adobe's page lists JPEG, JPG and PNG, but it also mentions PSD. Those two claims do not match. Check the file type before you upload, and save a PNG or JPEG copy if the upload fails.

![Photo editing desk with a monitor, the kind of setup used to resize an image in Photoshop on Mac](https://images.lazur.app/content-images/howto/resize-an-image-in-photoshop/how-to-resize-an-image-in-photoshop-2-60b9ef.jpg)

## Pick a size based on where the image will go

Start with the destination, not the number. A file for a screen only needs enough pixels for that screen. A print needs a resolution in pixels per inch and a physical width. Changing the pixel count alone does not set a print size.

Ask three questions before you type. Where will this image appear? Does it need to look sharp at a set physical size? Is the original large enough? If the answer to the last question is no, find a bigger source file instead of typing a bigger number.

## Common mistakes when resizing a photo in Photoshop

- Enlarging a small web image for print, then wondering why it looks soft.
- Switching off the chain-link icon and stretching the picture by accident.
- Resizing the original file and saving over it with ⌘S.
- Changing the units but forgetting to check the other field.
- Leaving Resample off and expecting the pixel count to change.
- Using Free Transform on one layer and expecting the whole file to shrink.

## Why resizing takes so long for many designers

- **43%** of designers in a 2023 survey said they resize graphics on their own ([source](https://www.prnewswire.com/news-releases/survey-85-of-designers-struggle-with-repetitiveness-of-resizing-graphics-301846391.html))
- **85%** of those who resize on their own say they struggle with the process ([source](https://www.prnewswire.com/news-releases/survey-85-of-designers-struggle-with-repetitiveness-of-resizing-graphics-301846391.html))
- **40 MB** maximum file size for resizing in Photoshop on the web ([source](https://www.adobe.com/products/photoshop/online.html))

A 2023 survey by Santa Cruz Software asked more than 350 designers how they handle resizing. The company sells its own resizing tool, so the press release promotes that product. The survey found that 43% of designers resize graphics on their own. Of those people, 85% said they struggle with the process, and 22% called it extremely frustrating.

The 85% figure applies only to the 43% who resize alone, not to all designers. The sample is designers in general, not Photoshop users specifically. Treat the numbers as a rough sign that resizing is tedious, not as a measure of Photoshop.

## Batch resizing is a different job

This page covers one image at a time. Resizing many files in one pass needs a different workflow, and the steps above do not cover it. If you resize a folder of files, test one file first so you can check the settings before the whole batch runs.

## What to do next after you resize

Once the size is right, check the file where it will be used. Preview it at real size on a phone, a laptop and a printed proof if you have one. If Photoshop slows down during the change, a full scratch disk can be the cause. The steps in [fix full scratch disks on a Mac](https://www.lazur.app/for/designers/problems/photoshop-scratch-disks-full-mac-fixes) cover that case.

If your version looks out of date, read [how to update Photoshop on a Mac](https://www.lazur.app/how-to/update-photoshop-in-photoshop) before you start. Keep your original file in a clearly named folder. Then you can repeat any size change without starting over.

## Shortcuts

- Open a file: ⌘O
- Free Transform (scales one layer): ⌘T
- Scale in Free Transform with proportions: Shift-drag
- Actual Pixels view: ⌘1
- Undo the last change: ⌘Z
- Save As: ⇧⌘S

## If it does not work

- **Width and height fields are greyed out** Resample is off, so the pixel count is locked. Tick Resample, set the units to pixels, then type the width again.
- **The image looks soft after I enlarged it** Photoshop had to invent pixels to enlarge the file. Start from a larger original, or enlarge less. Check text and edges at actual pixels before you export.
- **Height changed when I only wanted to change width** The chain-link icon is on. Click it to unlink the fields, set the width, then turn the link back on if you need the proportions to hold.
- **I saved over my original file** Press ⌘Z if you have not closed the file yet. Otherwise restore the file from your backup. Use Save As next time.
- **Photoshop on the web rejects my file** Check the 40MB file size and the 8,000 x 8,000 pixel maximum. Resize the file smaller, then upload it again. Save a PNG or JPEG copy if the file type is the problem.
- **The printed size is wrong after I changed the pixels** Pixel count and print size are separate settings. Check the Document Size fields, set the resolution you need, then confirm the printed width and height.

## With Lazur

Lazur is a voice assistant for the Mac that lives in the notch. Hold ⌥ ⌘ and ask; it sees your screen, answers out loud, points at buttons and walks you through apps. Hold fn to dictate. Free for 3 days, then $18/month: https://www.lazur.app/download

- “Where is Image Size?”: Lazur circles Image Size in the menu and labels it on your screen. You still make the clicks yourself. (Points at it)

## FAQ

### Does resizing an image in Photoshop on Mac lower the quality?

Shrinking keeps most of the detail, because Photoshop removes pixels it can spare. Enlarging forces Photoshop to guess new pixels, so edges and fine texture usually soften. Keep the original file and enlarge as little as you can.

### Why are the pixel width and height fields greyed out?

Resample is unchecked, so the pixel count is locked. Tick Resample to change the pixel count. Leave it off only when you want to change the resolution and keep the pixels the same.

### Will Save As change my original file?

No. Save As writes a new file under the name you choose, and the original stays on disk as it was. Use it before any big change so you always have a clean copy to return to.

### Can I resize a Photoshop image without the desktop app?

Yes, Photoshop on the web (Beta) uses the same Image > Image Size route. You need a Creative Cloud plan that includes Photoshop, and the browser version has a 40MB file limit and an 8,000 x 8,000 pixel maximum.

### Which macOS version does Photoshop 27.6 need?

CG Channel reports macOS 14.0 or later for Photoshop 27.6, which Adobe released on April 28, 2026. I could not open Adobe's requirements page to confirm it, so check that page before you update.

### Did the Image Size dialog change in newer Photoshop versions?

The coverage of Photoshop 27.6 does not mention any change to the Image Size dialog. Still, run the steps once on a copy of your own file before you rely on them for a client job.

### How do I set a specific print size in Photoshop on Mac?

Set the units to inches or centimeters in the Document Size section, then enter the resolution in pixels per inch. Check the printed width and height after each change, because the pixel count and the print size are separate settings.

## Sources

1. [How to resize an image in Photoshop in 5 steps](https://www.adobe.com/products/photoshop/resize-image.html), Adobe, checked 2026-11-09
2. [Photoshop on the web](https://www.adobe.com/products/photoshop/online.html), Adobe, checked 2026-11-09
3. [Photoshop (product page)](https://www.adobe.com/products/photoshop.html), Adobe, checked 2026-11-09
4. [When changing Image size 'pixels' is greyed out when I uncheck resample image](https://community.adobe.com/questions-712/when-changing-image-size-pixels-is-greyed-out-when-i-uncheck-resample-image-1081704), Adobe Community, checked 2026-11-09
5. [Adobe releases Photoshop 27.6](https://www.cgchannel.com/2026/04/adobe-releases-photoshop-27-6/), CG Channel, checked 2026-11-09
6. [Survey: 85% of Designers Struggle with Repetitiveness of Resizing Graphics](https://www.prnewswire.com/news-releases/survey-85-of-designers-struggle-with-repetitiveness-of-resizing-graphics-301846391.html), PR Newswire (Santa Cruz Software press release), checked 2026-11-09