How do I add more than one picture?

Add multi-images for Web View

You can create collages.

You can use this site for images: https://unsplash.com/

Create templates, work on images in https://www.canva.com/ 

Here's a link to a previous training: 
How to Create Collages in Axus using Canva & Unsplash 

Another option:

Use the OTHER/NOTES booking.

Don't add anything to the title, boxes, or notes below.
Upload an image to this booking and save.

Repeat this step a few times.

The images will show below the hotel booking.

Here is a web view of my itinerary example: https://axustravelapp.com/shared/itinerary/d617eac2-589b-4b6a-9667-13a62c264db8