Choose Format - Arrange - Send Backward (LibreOffice Writer, LibreOffice Calc).
Choose Shape - Arrange - Send Backward (LibreOffice Draw).
ትእዛዝCtrl+መቀነሻ ምልክት (LibreOffice ማስደነቂያ, LibreOffice መሳያ)
Open context menu - choose Arrange - Send Backward (LibreOffice Impress).