Is it possible to add CSS framework to template using Community Builder?

Hi Himanshu ,

You can add CSS frameworks to the template by editing the HTML Head Markup of the template in the community builder. Shown below.

Go to Community Builder -> Settings -> Advanced -> Edit Head Markup

Once You Click the Edit Head Markup Button, you will get a popup like shown in the image below where you can add CSS frameworks and other libraries just like you do in HTML.