Choose Format - Arrange - Bring Forward (LibreOffice Writer, LibreOffice Calc).
Choose Shape - Arrange - Bring Forward (LibreOffice Draw).
Commandបញ្ជា(Ctrl)+សញ្ញាបូក (LibreOffice Impress, LibreOffice Draw)
Open context menu - choose Arrange - Bring Forward (LibreOffice Impress).