When you open a document that contains an unsigned macro, or a signed macro from an unknown source, the Security Warning dialogue opens.
Enable or disable the macros. Choose LibreOffice - Security in the Options dialog box to set the options.
Opens a dialog where you can view the signature.
Adds the current macro source to the list of trusted sources.
Allows macros in the document to run.
Does not allow macros in the document to run.