RSS code in Mailchimp - is there a way to manipulate the code?

Question

I've been using this code via RSS items in Mail chimp:

|RSSITEMS:|
• |RSSITEM:TITLE|
|END:RSSITEMS|

Which drags the feed through like so: (see image) However - I want to be able to a. space between each story b. take out the underline c. increase the size of the text.

Is there something I can do in the customer code Rss items in mail chimp? If so what would it be? Or do I have to create a new feed to specify these things?

Thanks in advance! C

I've looked at different ways of changing the code in the custom Rss but I think its going to be a brand new feed created - never done that before but willing to learn.