Install libreoffice-style-oxygen by entering the following commands in the terminal:
sudo apt update sudo apt install libreoffice-style-oxygen
Description:
office productivity suite -- Oxygen symbol style
LibreOffice is a full-featured office productivity suite that provides a near drop-in replacement for Microsoft(R) Office. . This package contains the "oxygen" symbol style, default style for KDE 4.
Homepage: http://www.libreoffice.org
Version: 1:6.0.3-0ubuntu1
Section: universe/editors