How to Change (Shrink) an Image's Dimensions

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Shrinking an image is not just typing a smaller number. You build a target canvas, bring the photo in, scale it proportionally with Free Transform, then soften the empty bands with a gradient mask — the size lands exactly and the frame still looks full. It is the standard move for avatars and covers in Online PS.

1️⃣ Create the target canvas (500 × 500 px)

  1. Open Online PS and choose File → New from the top menu (or press Ctrl+N).
  2. In the dialog that appears, fill in:
    • Width: 500 px
    • Height: 500 px
    • Resolution: 72 pixels/inch (for screen use — the default is fine)
    • Color Mode: RGB, Depth 8 bit/channel
    • Background Contents: White
  3. Click Create and you have a 500 × 500 white canvas.

2️⃣ Import the photo you want to shrink

  1. From the Photoshop top menu choose File → Open (or press Ctrl+O).
  2. Pick an image stored on your computer (960 × 600 px, for example) and click Open.
  3. Take the Move tool (V) and drag the photo into the 500 × 500 canvas you just made — or drag the photo layer onto the target canvas in the Layers panel on the left.

3️⃣ Scale the photo down with Free Transform

  1. Select the photo layer and press Ctrl+T (or choose Edit → Free Transform). A transform box appears around the image.
  2. To scale proportionally, hold Shift (in recent Photoshop versions Shift does the opposite — the default is already proportional, so only press it when you want to turn proportion off), then drag any corner handle inward until the image is a little taller than the canvas (a bit over 500 px in height; the width gets cropped on its own).
  3. When the size looks right, press Enter (or click the check mark in the options bar) to commit the transform.
  4. If the visible area feels off-centre, grab the Move tool (V) again and nudge the photo so the important part sits in the middle of the canvas.
Tip:
  • In Photoshop, dragging a corner is proportional by default; hold Shift when you want it not to be.
  • Undo with Ctrl+Z, redo with Ctrl+Shift+Z.

4️⃣ Make the empty bands look intentional (gradient mask)(optional)

The canvas is square while the source is 960 × 600 (≈1.6), so keeping the full width leaves empty bands above and below. Here is a layer mask + gradient trick that lets the blank areas fade out instead of ending in a hard line.

  1. Make sure the photo layer is still selected.
  2. Click the Add Layer Mask icon at the bottom of the Layers panel (the rectangle with a circle in the middle) to give the photo a mask.
  3. With the new mask selected, switch to the Gradient tool (G), set the gradient type in the options bar to “Linear Gradient”, and choose Black → White (black hides, white shows).
  4. Drag once from the top edge downward (about a quarter of the height) to fade the top band, then drag once from the bottom edge upward to fade the bottom band.
  5. If you want two independent gradients (one for the top, one for the bottom), you can:
    • Put the current layer and its mask into a group (Ctrl+G).
    • Duplicate the layer inside the group, add a second mask to the copy, and repeat the gradient.
  6. When it looks right, save with File → Export As → PNG / JPEG. Tick “Maximum quality” on export.
Quick tip: if you would rather not drag two gradients by hand, run “Filter → Blur → Gaussian Blur” on the mask instead and soften the hard edge gradually — the transition ends up just as natural.

References

  • Online PS
  • Adobe official documentation
  • Photoshop tutorial sites