To be able to make changes to the Identity module a box in the Maintenance settings has to be checked. This can be done by clicking on ‘Maintenance’ and unfold the ‘Settings’ menu on the right. The box ‘Has own guidelines’ needs to be checked.
Once you have pressed the pencil icon that menu will appear. There is a dropdown menu in the red highlighted box (number 1) which is linked to the other red highlighted box (number 2). Selecting a different option from the dropdown menu (box 1) gives different looks to your Brandifyer page. Dragging a different file into box 2 uploads a new file onto Brandifyer. Press ‘Save’ to save your new file or cancel to cancel the changes.
This article also has a Youtube video to show how this action can be done.