LibreOffice 5.3 has been released with a new look,with more tools, more user interface. You need to try.
Install or Update to LibreOffice 5.3 in Ubuntu 16.04 14.04 LTS
LibreOffice 5.3 

What are new on LibreOffice 5.3?

LibreOffice Writer:  

LibreOffice Writer 5.3
LibreOffice Writer 5.3
LibreOffice Calc: 
LibreOffice Calc 5.3
LibreOffice Calc 5.3
LibreOffice Presentation:
LibreOffice Presentation 5.3
LibreOffice Presentation 5.3

LibreOffice Drawing:
LibreOffice Drawing 5.3
LibreOffice Drawing 5.3
To see more new features, check the release note.

Update via terminal:

Step-1: Add LibreOffice PPA
Run the following command and hit Enter.
sudo add-apt-repository ppa:libreoffice/ppa
Step-2: Now update and upgrade by running the following command. 
sudo apt update; sudo apt dist-upgrade
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