Artboards combined resize issue

When working with multiple artboards of different sizes, Photoshop calculates Image Size based on the combined canvas dimensions rather than scaling each artboard proportionally.

Example artboards:

• 2160 × 2160

• 2160 × 3840

• 2400 × 3000

• 2400 × 1256

When opening Image Size, Photoshop shows a single combined resolution.

If you then scale the image to 50 percent in order to reduce all artboards by half, the resulting artboard dimensions are incorrect. Instead of cleanly halving the values, Photoshop consistently adds 1 extra pixel to the height.

Examples:

• 2160 × 2160 becomes 1080 × 1081

• 2160 × 3840 becomes 1080 × 1921

• Similar +1 pixel height offsets occur on all artboards

Expected Result

Each artboard should be resized proportionally, with exact half values and no rounding errors.

Actual Result

All artboards receive an additional 1 pixel in height after scaling.