Uwk2Y‖Inserts the current time as a field. The time is taken directly from the system settings of your operating system. A fixed time format is applied, which cannot be updated by using the F9 function key.
Sq7ra‖Inserts the subject specified in the document properties as a field . This field displays the data entered in the Subject field under File - Properties - Description.
4fVi2‖Inserts the title specified in the document properties as a field. This field displays the data entered in the Title field under File - Properties - Description.
LwuLJ‖Inserts the name of the person who created the document here as a field. The field applies the entry made under LibreOfficeDev - PreferencesTools - Options - LibreOfficeDev - User data.