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How do I create an image mask in InDesign?

Published in InDesign Masking 3 mins read

To create an image mask in InDesign, you essentially use a shape to clip or crop an image. Here's how:

Steps to Create an Image Mask

  1. Create the Shape: Use the drawing tools (Rectangle, Ellipse, Polygon, or Pen tool) to create the shape you want to use as your mask. This shape will define the visible portion of the image. You can draw any shape you like!

  2. Placing a New Image (If Not Already in InDesign):

    • Select the shape you just drew.
    • Go to File > Place.
    • Select the image you want to place inside the shape. The image will automatically be masked by the shape.

  3. Masking an Existing Image:

    • Cut the Image: Select the image that's already placed in your document and press Ctrl+X (Windows) or Cmd+X (Mac) to cut it.
    • Select the Shape: Click on the shape you want to use as the mask.
    • Paste Into: Go to Edit > Paste Into. This pastes the cut image inside the selected shape, effectively masking the image.

Fine-Tuning the Mask

  • Direct Selection Tool (White Arrow): Use the Direct Selection tool (the white arrow in the toolbar) to select the image within the mask. This allows you to reposition, scale, or rotate the image inside the mask without affecting the shape of the mask itself. Click once on the masked image, and you'll see a different bounding box that represents the actual image.

  • Moving the Mask: Use the Selection tool (the black arrow) to move both the mask and the image together.

  • Resizing the Mask: Use the Selection tool and drag the handles of the mask to resize it. This will crop the image differently, but won't resize the image inside the mask. If you want to resize the image inside the mask along with the mask size, hold Ctrl (Windows) or Cmd (Mac) while resizing.

Important Considerations

  • Stacking Order: Ensure the shape is above the image in the stacking order. If the shape is behind the image, the mask won't work.
  • Transparency: You can use transparency in your mask shape for feathered edges or other effects. Apply effects to the mask (e.g. Object -> Effects).

By following these steps, you can create effective image masks in InDesign, allowing you to creatively integrate images into your designs using various shapes and forms.

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