Liferay: Disable portlet border

Aim: Disable border for all portlets

Solution:

The easiest way to do this is using theme. Open liferay-look-and-feel.xml  add to it below line to achieve the purpose by default for all portlets.

<theme id="myTheme" name="myTheme">
       <settings>
            <setting key="portlet-setup-show-borders-default" value="false" />
        </settings>
</theme>