Setting Image Size

By default, images are square, but this can be easily changed. Besides the size of the image, other settings that determine how the image is rendered to a file or printed can be specified.

1. Make sure the details panel on the right is shown (click the button on the bottom right or type 'd' if it isn't shown).

2. Select the "info" tab (the "i" in a circle).

3. To change the size, either enter a value in inches or pixel for width and height. It will automatically update the corresponding value, based on the document DPI.

4. To change the resolution of the rendered file, select the desired DPI from the DPI menu. 72 is appropriate for files for webpages, desktop images, or patterns. 300 is a reasonable value for printing on most printers.

5. To change the antialias quality, select the desired setting from the antialias menu. A higher setting will result in a smoother looking result (since this actually renders at a higher resolution and blends it together). It is especially important for good results when producing low resolution files. Note that 2:1 takes four times as long to render, and 4:1 takes sixteen times as long. This does not impact the display (which is controlled by a preference setting).

6. Export alpha channel is useful for rendering files. When this is checked, the alpha component generated is saved in the file, but instead of having the backdrop color behind it, it will be transparent. This allows you to render something and place it on top of another image in your favorite image editing application.