Images can be displayed full screen currently, but the user must initiate the option by clicking the image inside the chat convo. A sentence explanation should be enough to get the users acclimated, and you are good to go! You can also embed slideshows and videos in the bot conversation as well. Check here to see how add presentation slides. And you can check here for a video tutorial on embedding videos (and maps and presentations again) into the conversation.
I’ve done some fun work with FAQs. Even though this one is missing the ability to schedule an appointment, its a has a simple FAQ built into it you can check out. It uses conditional jump logic and auto-suggest to navigate the user as well as a short collection of keywords for when users want to say it in their own words https://botz.hellotars.com/conv/HkfYGC/