Comments are descriptive text added to the .pre file to help understand and follow the code execution.

Comments can be added to the script by inserting “**” followed by a space, for example:
** This is a comment
A comment may also be added after the last column of a card, after the comment indicator (“**”).
Note: Some cards use comments at the end of the card to indicate the name of the source, load or request. Care should be taken not to mistake these for comments.