LibreOffice CALC Notes

Upon saving a CALC file, was asked “Your file contains notes, continue saving? Y/N” I didn’t add any notes and can’t find any documentation referencing “notes”. Can you help me out?

Menu/Tools/Options/LibreOffice/Security - Security Options and Warnings - Options - Security Warnings.

very helpful! This solved the issue for good!

Thanks for your reply. I found the option to warn me if there is hidden information or notes in the file being saved. My question was, however (that I didn’t specifically ask), is how do I enter / edit notes and/or hidden information? And what could I have done (other than actually enter notes, which I didn’t) to cause the original warning to be displayed when I saved my file? This warning has been displayed to me ONLY this one time - never before, nor since.