How to Scale from Center in GIMP

When resizing layers, selections, or paths in GIMP, scaling typically anchors to the opposite corner or edge of the bounding box. However, you can scale an image symmetrically outward from its center by using a specific keyboard shortcut. This article explains the exact keyboard modifier needed to scale from the center using GIMP's Scale tool, along with practical steps to streamline your image editing workflow.

The Keyboard Modifier: Ctrl (Command on macOS)

The keyboard modifier that allows you to scale an image outward from its center in GIMP is the Ctrl key (or the Command key on macOS).

Holding down this key while transforming an object automatically sets the anchor to the center point, expanding or contracting all sides equally relative to the middle of the layer or selection.

How to Scale Outward From the Center

  1. Select the Scale Tool: Click the Scale tool in the Toolbox or use the default shortcut Shift + S.
  2. Activate the Layer: Click directly on the layer, selection, or path you wish to resize. A grid and transformation handles will appear around the object.
  3. Hold the Modifier Key: Press and hold the Ctrl key (Cmd on macOS).
  4. Drag to Resize: Click and drag any of the outer handles. The layer will expand or contract outward from the center instead of from the opposing corner.
  5. Maintain Proportions (Optional): If your aspect ratio is not locked in the Tool Options, you can hold Ctrl + Shift simultaneously to scale outward from the center while preserving the original width-to-height ratio.
  6. Apply the Transformation: Release the mouse button and click the Scale button in the floating dialog, or press Enter on your keyboard.

Alternative Method: Tool Options

If you prefer not to hold a key, you can activate this behavior permanently via the user interface. In the Tool Options dock on the left side of the screen, locate the Transform section and check the box labeled Around center. With this setting enabled, the Scale tool will automatically scale outward from the center point without requiring any keyboard modifiers.