I also need the numbering to the process activity removed. So as a workaround to this and to add to Lea's suggestion above, I developed a page in Word or PowerPoint and saved each page as a picture (using the snipping tool or some such method to capture the screen as a picture for me).
Being mindful of the layout you would wish to have on screen, I added all my information to the page saving each page as its own picture (grouping the elements). Then adding each picture to RISE within a carousel block.
It's not perfect but it achieves a similar process depending on what you do, it can be a shade fuzzy but it does achieve the activity needed. Word or PowerPoint also gives you more editing power such as fonts/images/layout etc. Its at least a workaround until the process activity can be worked on.