How can you preview for different devices in Captivate to ensure the design is responsive for mobile learning?

I saw my project on a laptop and had to scroll down to see the Back/Forward buttons. I’m now concerned that if the design isn’t responsive on a laptop, what will it look like on a mobile device once published. I don’t want learners to have to look for the button to continue as that will be frustrating. I’m using the latest Captivate 19 I believe it ‘s called. Thank you!