The final way to arrange the content on your boards is arranging frames in the Presentation mode.
On the lower left-hand toolbar, click the Frames icon and view all the frames that you have on your board. Note that unless manually changed the order of the frames is the order in which they were created and it might be different from the order you have visually placed them on the board. To set the order just click and drag the frames on the sidebar.
If you click on the three-dot menu next to the frame's name, you'll be able to rename the frame or create a new one right next to it.
If you click on the Presentation mode icon next to the Frames one, you can view your frames as if each of them represented a slide in a multimedia presentation. While in the Presentation mode, the main toolbar is locked and the board is available in the view-only mode.