Comments in scripts are preceded by double hyphens (-). You can place a comment on its own line or after any statement. Lingo ignores any text following the double hyphen on the same line.
Comments can consist of anything you want, such as notes about a particular script or handler or notes about a statement whose purpose might not be obvious. Comments make it easier for you or someone else to understand a procedure after you've been away from it for a while. Use the Comment and Uncomment buttons in the Script window to enter and remove comments easily.