BEFORE YOU BEGIN
86 About Size and Resolution
87 Change Image Size or Resolution
Each image begins with a canvas essentially the image background. The benefit of thinking of an image's background layer as a canvas is that it helps you conceive how that layer can be stretched to change the size of the area on which you can paint. For a newly imported digital photo, the image is " painted ," if you will, to fill the canvas. You can expand the background layer (the canvas) of an image such as a photograph, for example, to make room for a frame, and then fill the new area with color or texture. Or you might simply want to expand the canvas to create more room in which to add a clip from another image, an object, or some text.
Canvas In PSP, the canvas is the geometric platform that provides the coordinate system for every image, and to which the background layer is attached.
When you expand the canvas for an image, you expand the background layer. If you've already created other layers in the image, all those layers are expanded by the same amount. If the background layer is transparent, any extra space you create is filled with transparent pixels. You can choose to fill the extra space in the background layer with a color you select.
Display Canvas Size Dialog Box
Choose Image, Canvas Size from the menu bar. The Canvas Size dialog box is displayed.
88. Change the Working Area Without Affecting Image Size
Enter New Dimensions
If you want the image to retain its ratio of height to width after stretching the canvas, enable the Lock Aspect Ratio option.
To change the aspect ratio to fit a specific formatsuch as 1.33 to 1 for a standard television screenenter the aspect ratio you want in the box.
You can reduce the canvas size of an image. If you do, all the layers are reduced in size, but data is not removed from the non-background layersit's just placed off the canvas where it is not seen in the final image.
Choose a Fill Color
If the background is not transparent, you can choose a color to fill the extra canvas space. Click the Background color picker and select a color. You can also click anywhere in the image to pick up that color with the dropper.
Select a Placement and Click OK
To choose how you want the new canvas space distributed, click a Placement button. The button you click indicates where the image should appear in relation to the new canvas areas. If you click the center button, for example, the new canvas space is distributed around the image evenly; if you click the upper-left corner button, the image is placed there and the new canvas areas are inserted along the bottom and to the right. Click OK , and the canvas is expanded as directed by your selections.
View the Results
In the sample figure, the canvas was expanded to the right and along the bottom, text was added, and several new images were pasted into the image to fill the new space.