The Copy Tag To Tag function allows you to copy information from one metadata tag to another. For example, if you wanted to copy the Track Artist to the Album Artist, you can use the Copy Tag To Tag function to do it.
Destination Tag - This is the tag that you are copying to. You can type in any tag you want, or select one from the drop down list.
Format String - The format string allows you to construct what you want to be copied to the Destination Tag. You can enclose tag names in brackets and Metadatics will replace them with the actual tag value. In the screenshot above, the TRACKARTIST tag will be copied to the ALBUMARTIST tag. You can also put your own text anywhere outside the brackets. You can even have multiple tags in the format string, for example: {TRACKNUMBER} - {TRACKTITLE}
Apply To - Allows you to choose if you want to apply this function to all files or only the selected files.
Preview - When you turn on Preview Mode, you will see what the results of this function are going to be. The results will be shown in red text.