Custom Button or Action to open a new page

In classic I have a URL button that when clicked opens the page of a flow in a new page. In Lighitng I am not given that option and the only thing I have is to replace the page or put a static popup on the page. Neither will work as users need to see their notes as they complete tha page.

Not being a dev I am trying to see what options there may be that will allso users to click on the buttom in Lightning and have the flow open it's page in a new screen that can be moved around as needed.

Any ideas are great and thanks in advance for any help.