LibreOffice looks in KDE like from 90's

Question

I have some applications (for example LibreOffice) which looks really weird, design like from 90's.

As you can see here:

How can I fix it, please?

Answer 1

You need to change your theme.

Either via gtk https://elementaryos.stackexchange.com/questions/1103/how-can-i-make-libreoffice-look-better

Or you install a theme directly http://www.debugpoint.com/2016/08/quick-tip-change-the-default-libreoffice-look-and-feel/

Most application use the general theme you set. You can change the theme in the kde settings.

Answer 2

Try:

sudo apt-get install libreoffice-kf5