When checked, the image will be exported with lossless compression. This will create a higher quality image at the cost of a larger file size.

When unchecked, the image will use a lossy compression technique that can reduce the file size more.

When Lossless is unchecked, this setting influences the amount of compression. Lower values give higher quality. At the minimum value of 1.0 it is visually almost the same as lossless.

This setting determines how much effort the encoder will put into reaching the desired quality, influenced by the Compression/maxError parameter.

A higher effort may create more accurate results, but sometimes higher file size in lossy compression mode. A higher effort also consumes more memory too. Usually there is no reason to change the default value (squirrel).

Determines if the pixel data should be stored using 8 bits or 16 bits per color channel.

If you have a CMYK profile assigned to your image as soft-proofing profile, this setting can be checked to have your image exported using that CMYK profile. This is sometimes required when you have your image professionally printed. Your printing company will tell you if this is needed.

If this setting is disabled, you don't have a soft-proofing profile set for this image yet. See assigning a Soft-Proof Profile.

The name of the CMYK profile that is assigned to this image will be shown below this setting.

If checked, the Exif metadata is embedded in the exported image.

If checked, the XMP metadata is embedded in the exported image.