Use the Resize dialog box when you want to resize an image but not crop it or add new canvas around it. To change the dimensions of the image by adding pixels to or removing them from the edges of the image, use the Change Canvas Size dialog box.

To use the Resize dialog box:

1 Select a method for resizing the image. You have three options:

• Pixel Size, where you select a new size by choosing a new measurement in pixels,
• Percentage of Original, where you select a new size based on a percentage increase or decrease from the original, and
• Actual/Print Size, where you select a new size by changing the resolution or the dimensions. Note that the two are linked.

2 Use the numeric edit controls to enter new measurements in the Width and Height boxes of the selected panel. In the Actual/Print Size panel, you can also change the resolution.

3 In the Resize Type box, select the type of resizing for Paint Shop Pro to apply. There are four choices:

• Smart size, where Paint Shop Pro chooses the best algorithm based on the current image characteristics.
• Bicubic resample, which uses a process called interpolation to minimize the raggedness normally associated with expanding an image. As applied here, interpolation smoothes out rough spots by estimating how the "missing" pixels should appear, and then filling them with the appropriate colour. It produces better results than the Pixel resize method with photo-realistic images and with images that are irregular or complex. Use Bicubic resample when enlarging an image.
• Bilinear resample, which reduces the size of an image by applying a similar method as Bicubic resample. Use it when reducing photo-realistic images and images that are irregular or complex.
• Pixel Resize, where Paint Shop Pro duplicates or removes pixels as necessary to achieve the selected width and height of an image. It produces better results than the resampling methods when used with hard-edged images.

4 In an image with more than one layer, select the “Resize all Layers” check box to resize the entire image. Leave the box unchecked to resize only the active layer.

5 To change the proportions of the image, select the “Maintain aspect ratio of” check box and type a new ratio for the image width. Aspect ratio is the relationship of the image’s width to height. By default, the Aspect ratio box displays the image’s current aspect ratio. 

6 Click OK to close the dialog box and apply the changes.
 

 
Note: After resizing, many images can be improved by using the Sharpen filter.

Bilinear and Bicubic resampling are available only for grey scale images and 24-bit images. To resample an image with a lower colour depth, do the following: 

1 Increase the image’s colour depth.

2 Resize the image. 

3 Reduce the image’s colour depth to the original depth.