Click Insert Comment on the SYSTEM ribbon panel to display the Insert Comment window.
This places a comment into the script file. It has no effect on the actual report generated. You must press Insert (or Update if editing an existing command) for your changes to be applied to the current script in the editor.
Insert comments at appropriate places in your script file to explain what the script is doing. For example, at the top of the script file you could put a comment detailing what the script has been designed to do. Comments are prefixed with //. For example:
Comments inserted with the editor will automatically prefix your text with //. You only have to specifically prefix your comment with // if writing your own script outside of the editor.