P: Canvas Size relative Width/Height not recorded in Actions (values saved as blank)

I’m not seeing this. I ran existing an action with Canvas Size yesterday and it worked fine. Modern User Interface on (with ugly Canvas Size dialog) on Tahoe 26.3.

The canvas size not actionable issue is annoying. The problem is when recording the action, as existing canvas size actions were not affected, nor were they editable.  Semaphoric is right,  disabling Enable Modern User Interface in the Technology Preview section of prefs, solves the issue.  I did not even need to restart.  The tech preview of this new canvas size is frankly ugly and it is Adobe breaking a tool that was already tried, true and nearly perfect in a failed attempt to create a nicer user interface. Bad move. I want to know why this Modern User Interface was turned on without my input.   Thanks Adobe developers, you cost me about 45 minutes of my time while in the midst of a tight deadline. 

I don’t know if this will help, but in the Technology Preview section of the preferences, try disabling Enable Modern User Interface, restart Photoshop, and see if the issues persist.

Hello Adobe Team,

I would like to report a reproducible regression in Photoshop 2026 affecting Actions that include the command:

Image → Canvas Size

When an Action contains a Canvas Size step, the Action fails during playback. This affects:

• Manual Action playback

• Batch (File → Automate → Batch)

• Image Processor (File → Scripts → Image Processor)

Observed behavior:

• As soon as "Canvas Size" is included in an Action, the Action fails to execute properly.

• Other steps within the same Action (e.g., Image Size, Save, Close) are skipped or stop executing.

• In some cases, the error message appears:
  “The command 'Image Size' is not currently available (-25920)”
  even though a document is open and active.

• The exact same Action works perfectly in Photoshop 2025 (stable version).

• The issue is fully reproducible.

Test conditions:

• Standard RGB 8-bit JPEG files

• No active selections

• “Relative” option disabled in Canvas Size

• Dialog icons disabled in Actions panel

• No plugins installed

• Background layer unlocked (also tested both locked and unlocked)

• Same behavior across multiple images

Platforms tested:

• Windows 10 (64-bit)

• macOS (2024 MacBook Pro, Apple Silicon M-series)

• Photoshop 2026 (latest version at time of writing)

The problem appears to be a regression specific to Photoshop 2026 and makes automated production workflows involving Canvas Size unusable.

Please investigate this issue.

Thank you.

I’m seeing the same issue in Photoshop 27.4.0 Release (not Beta) on macOS (Apple Silicon).

When recording an Action using Image > Canvas Size, the step records but the Width and Height values are saved as blank. This happens in both Relative and Absolute modes.

The Canvas Size dialog also defaults back to Pixels even though my global Units are set to Inches. Even after manually switching to Inches, the Action does not retain the dimensions.

I’ve reproduced this on two separate machines, including a fresh install. This worked correctly in prior versions. I can complete the task manually, but it slows down batch workflows that rely on consistent canvas expansion. 

Upvoting — thank you for looking into this. Currently resizing canvases manually like it’s 1995.

빨리 좀 해결해주세요. 이것떄문에 대량 이미지작업을 못하고 있습니다.

I used the Crop Function in my automation to record the canvas size change as a temporary workaround.

I’ve come across the same issue but with Absolute values! When trying to change the Canvas Size to for example, 1024x1024, the action is saved but not the values. 
I know that it’s not your issue, but for me I had to create a script/command sequence that changed the size, and when recording I run that instead of “canvas size”. I’m pretty sure you can also do it with Relative values, you’d need to assign how much you want to add/substract and then add/substract it from the file’s canvas size.
Quick example:

var doc = app.activeDocument;

// define how much to add (positive) or substract (negative)
var widthExtra = 100;
var heightExtra = 100;

doc.resizeCanvas(doc.width + widthExtra, doc.height + heightExtra, AnchorPosition.MIDDLECENTER);

問題： 

• Photoshopバージョン: Beta v27.5
• OS : Windows11

再現手順:

1. アクション記録開始
2. イメージ→カンバスサイズ数値設定
3. アクション記録終了

期待される結果: カンバスサイズに指定したサイズへ変更
実際の結果: カンバスサイズに指定した数値が空欄になっている

Hi ​@Klavdiy24895132ql2j this is a known issue the team is working on.

Thanks,

Cory - Photoshop Product Manager