Edit Menu: Transform

Changing the perspective, angle, rotation, or scale of either an image or a selection can be done through transform. Making a transform ...

Changing the perspective, angle, rotation, or scale of either an image or a selection can be done through transform.

• Making a transform using layers and selections. To make a Transform, the image must be on a separate copy layer, or it must be made from a selection. it is not possible to the Background Layer. The style is chosen from the Transform sub menu, and the image or selection will then show a bounding box linked by eight small boxes, known as handles. Drag the handles to form the correct shape. To complete the Transform, either press the Return key, double-click inside the bounding box, or select Commit Transform in the Tool bar.
• Scale. To change either the height or length, click on the middle on the relevant plane and drag it up or down (or from side to side) to enlarged or reduce as desired. to change the scale of both height  and length in proportion, click on one of the corner handles and then drag.
• Rotate. Use to rotate your image or selection. Click above any of the handles and then drag to the left or right. Rotate and scale are combined in Free Transform (shortcut Ctrl/T).
• Setting the Tool Options bar. Most Transform can also be controlled from the Tool Options bar. There are boxes to enter exact percentage increases or decreases for length and height, as well as for the angle of rotation.
• Skew. Use Skew to slant a selection to the left or right, or upward or downward. Drag the center handle to do this accordingly. If you drag a corner handle, the slant will be applied to only one side.
• Distort. This combines the actions of Skew and Scale. drag a corner handle to make the distortion biased to one side of the selection. Use a middle handle to distort that plane.
• Perspective. The angle and level of how you look at an object or a scene (and how you photograph it from this position) is known as perspective. When a building is photograph from ground level, near its base, its top appears smaller (the angles converge), and the bottom bigger (the angles diverge). Transform Perspective can correct this distortion, or it can be used to create a false perspective to give an impression of scale. To broaden the perspective, drag a corner handle outward. To decrease it, drag it inward.
• Warp. Use this very sophisticated Transform to make your image look as though it's wrapped around a three-dimensional object.
• Viewing the Transform. If transforming the perspective or distortion of a complete image, using the Move tool, into a new empty file with a white background, bigger than the original image, so there is space to see the effect of the transform.
• The Grid. To make sure straight lines are in perspective, use a grid (found in View menu). Change the style and size of it in Preferences in the Photoshop menu.
• Warning. Remember that a digital image comprises pixels, and that any major transform that enlarges a selection will possibly display the unwelcome signs of "pix elation."