LizardTech user metadata is merely descriptive and has nothing to do with the image pixel data. There are 12 default user metadata tags. They can be thought of as addenda or footnotes and include such data as geographic location, company name, and scan info. You can include data for any or all or none of the tags, and you can add your own custom user metadata tags for other information you would like to include. All of LizardTech's user metadata tags can be edited.