To update the topics and writers you follow, follow the instructions below:
Open the Bulletin app.
Select the 'My Bulletin' tab at the bottom of your feed.
Select the 'Edit' pencil icon in the top right-hand corner of the screen.
Click any additional topics and writers you'd like to follow, or untick any topics or writers you're no longer interested in.
Tap 'Save selection' at the bottom of the page for these preferences to be updated.