Hi Brock thanks for posting! You can adjust the size position and aspect ratio of your slides from the presentation mode box by clicking the gear icon in the top left. I recommend checking out this section of our presentation mode article for detailed instructions. If you need all your slides to be one size you might find it helpful to duplicate an existing slide container that is the correct size and reposition it on your canvas to contain whatever part of the diagram you want to see on the slide. Let me know if you have any questions. Hope this helps!