There are 3 ways to create a page with Fluid UI:
Double click anywhere on the canvas when zoomed out to create a page at that location.
Use the add page icon when zoomed out.
Create a link from one of your widgets and drop it on "New +".
Once created, pages can be moved around the canvas to create a storyboard for your prototype.
You can clone a page by clicking the sheep in the page menu.
Deleting a page
You can delete a page by focusing on it and clicking delete in the page menu or by dragging it to the trash in project context.