Hi. My idea is to have buttons to save camera positions in the ui, like 1-9. If you click on it to save a position it would then take a screenshot and place a thumbnail next to that number. Or something like that. Then you could click on the thumbnail (albeit, perhaps not up to date image) to load that camera position. Apparently it may be possible to save the screen thumbnail this with the script below. I am not sure if it would work. http://html2canvas.hertzen.com/examples.html
There's a mod that does most of this already: https://forums.uberent.com/threads/rel-anchor-buttons-v1-1-57703.54563/