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Chapter 7. Layers > Transform layers

Transform layers

To transform (scale, rotate, skew, distort, or apply perspective to) a layer by dragging:

1.
On the Layers palette, activate the layer you want to transform. Any layers that are linked to the active layer will also transform. You can’t transform a 16 bits/channel image.

Optional: Create a selection to limit the transformation to those pixels.

2.
Choose Edit > Transform > Scale, Rotate, Skew, Distort, or Perspective. A solid bounding box will appear around the opaque part of the layer or the selection.

3.
Optional: To transform the layer or selection from a location other than its center, move the reference point . You can move it outside the bounding box.


Scale


4.
Note: If you’re going to perform multiple transformations, to save time and preserve image quality, after performing this step for the first command, choose and then perform additional transform commands, and then accept them all at once (step 5).

To Scale the layer horizontally and vertically, drag a corner handle . To scale only the horizontal or vertical dimension, drag a side handle. Shift-drag to scale proportionately. Alt-drag/Option-drag to scale from the reference point.

For Rotate, position the pointer near a bounding box handle, either inside or outside the box (the pointer will become a double-headed arrow), then drag in a circular direction . Shift-drag to constrain the rotation to a multiple of 15°.


Rotate


For Skew, drag a corner handle to reposition just that handle or drag a side handle to skew along the current horizontal or vertical axis. Alt-drag/Option-drag to skew symmetrically from the center of the layer.

For Distort (, previous page), drag a corner handle to freely reposition just that handle or drag a side handle to distort the side of the bounding box along the horizontal and/or vertical axis. Altdrag/Option-drag to distort symmetrically from the center of the layer. Distort can be more drastic than Skew.


Distort


For Perspective, drag a corner handle along the horizontal or vertical axis to create one-point perspective along that axis . The adjacent corner will move in unison. Or drag a side handle to skew along the current horizontal or vertical axis.


The original image



A perspective transformation


5.
To accept the transformation, double-click inside the bounding box or click the on the options bar (Enter/Return). To cancel the transformation, click the (Esc).

Tip

To undo the last handle modification, choose Edit > Undo.



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