Display more lines on SharePoint news feed

Dear community,

I am quite new to SharePoint, and maybe I lack the right words to describe what I need solved. However, I am creating a news web part on a SharePoint homepage and I need more lines in the description display. 

I have found the following image in one of the Microsoft support sites: Use the News web part on a SharePoint page - Office Support (microsoft.com) Still, I haven't found how exactly to do this:

Here, there are 2 lines. Usually, in my news web part I only have 1 line. I would really appreciate your assistance!

Best regards,

Indie