(Q) how do I change what feed are seen in samsung my magazine. topic

The Samsung my magazine app, bloatware but heck I might as well try to enjoy it.
Anyone know how to specify exactly which feed it uses for the news feed. Ie how do I remove for example 'the guardian' and add 'bbc news'.
Since there is no in depth option in the app. I assume there will be a text file somewhere for this.