Choose Format - Arrange - Send Backward (LibreOffice Writer, LibreOffice Calc).
Choose Shape - Arrange - Send Backward (LibreOffice Draw).
āĻāĻŽāĻžāĻ¨ā§āĻĄCtrl+āĻŦāĻŋāĻ¯āĻŧā§āĻ āĻāĻŋāĻšā§āĻ¨ (LibreOffice āĻāĻŽāĻĒā§āĻ°ā§āĻ¸, LibreOffice āĻĄā§āĻ°)
Open context menu - choose Arrange - Send Backward (LibreOffice Impress).
āĻāĻāĻ§āĻžāĻĒ āĻĒāĻŋāĻāĻ¨ā§ āĻĒā§āĻ°ā§āĻ°āĻŖ