Changing the Size of an Image
Changing the size of an image is one of the most common tasks carried out in Photoshop. Whether you want to turn an 8x10 image into a 4x5 image, or enlarge a small wallet photo into a larger one, the place to start is the Image Size dialog box. To access the Image Size dialog box, follow these steps:
In the example below, you can see that the document size is approximately 14x10 inches with a resolution of 72 pixels/inches. To change this size, type in a new value for width or height. If the Constrain Proportions box is checked, the other value will change automatically. The Constrain Proportions option ensures that you won't distort your image when you resize it. You can see how the changes to the size of an image affects file size by examining the values displayed next to the words "Pixel Dimensions" at the top of the dialog box.
Changing the Canvas Size
The Canvas Size dialog box allows you to add or subtract working space from the current image. To access the Canvas Size dialog, follow these steps:
- Click Image from the Menu Bar.
- Click Canvas Size. From here, you can change the values for width and height to modify the amount of canvas available. If the Relative checkbox is checked, you can simply enter the amounts by which you want to increase or decrease the size of the canvas instead of needing to calculate how big your image should be after the canvas is modified. Additional canvas is the color of the current background color. Subtracting from the canvas will effectively crop your image.