To rename an article collection in the BrowZine app click onto the "My Articles" tab. Then click the "Edit" button in the upper-right-hand corner of the screen. This will let you re-name collections and delete them as necessary. If you would like to add a new collection click in the upper-left-hand corner of the screen on the plus icon. 

Renaming an article collection is very similar to renaming a bookshelf. Hover over the name of the collection and click the pencil icon. Here, you will be able to edit the name of the collection. On the left-hand side of the screen, you can also add a new folder by clicking on the button that says "create a new collection."