| Value | Description |
|---|---|
| jcCopyNone | Copy no extra markers from the source file. This setting suppresses all comments and other excess data present in the source file |
| jcCopyComments | Copy only comment markers. This setting copies only the comments from the source file, discarding all other inessential data |
| jcCopyAll | Copy all extra markers. This setting preserves miscellaneous markers found in the source file, such as JFIF thumbnails and Photoshop settings. In some files these extra markers can be sizable |