The Size item provides five standard icon image sizes:
16 by 16 pixels (typical cursor size)
32 by 32 pixels (the required size for File Manager data file icons)
48 by 48 pixels
64 by 64 pixels (typical application icon size)
128 by 128 pixels
If you change the size of the canvas when an icon file is loaded, the file is read from the upper left corner. Larger images are cropped to fit the existing size of the canvas. In the example shown in Figure 15-17, the canvas with the cat.icon file has been resized to 32 by 32 (XView format) pixels.