This selects the type of image you are trying to export. Presumably this will help in deciding the best way to compress the image.

Choices are: Default, Picture for digital pictures, like portraits or inside shots, Photo for outdoor photography with natural lighting, Drawing for hand or line drawing, with high-contrast details, Icon for small-sized colorful images, and Text for images containing mostly text.

When checked, the image will be saved in a way that keeps the original quality. This disables the Image quality and Alpha quality settings. When unchecked, the image will be saved based on the quality settings below, which may cause some loss of quality, but at a better compression ratio. This is the default.

These settings determine at what quality the image will be saved. A higher image quality usually means a larger filesize. When filesize is important you can check if a lower quality is still good enough for your purposes.

When checked, a sharper and more accurate RGB to YUV conversion method is used to export the image. This can better preserve fine details like thin lines in the final image. Setting this option can increase the export time for an image, and it is only available when Lossless is not checked.

When enabled, an animation will be created, where each layer is a separate frame in the animation.

When working on an animation, the name of the layer can be used to specify certain parameters. For more details see exporting animations.

You can click the “(edit)” link to open the metadata editor to change or add any metadata that you want to be included in the image. Note: you will also still need to enable the relevant metadata saving options listed below.

When this option is enabled existing EXIF metadata will be saved in the exported image.

When this option is enabled existing IPTC metadata will be saved in the exported image.

When this option is enabled existing XMP metadata will be saved in the exported image.

When this option is enabled the color profile will be saved in the exported image.

When this option is enabled a thumbnail will be saved in the exported image.