Thank you. This nearly looks like it’s working to me. So, what exactly is the issue? Is it for the scrolling of your left-menu images? I understand you want to use arrows to scroll; shouldn’t be a problem. A scrollviewer with some stackpanels to host the images would look like a perfect fit to me.
Edit: I guess I must have something similar in an old project of mine "Project Chair"
Load the scene, click on the third icon in left menu. From there you can pick a category and below browse from the category (images) with arrows. Is that similar to what you want? It is based on a scrollviewer with added children and resizeToFit.
Edit1: Here’s another recent link to a topic I answered regarding the use of a scrollviewer to display children (eventually dynamically). I hope this helps, else let me know