Thank you. You are right, wrangling windows seems a bad idea. But wrangling tiles should be a doddle.
My project involves taking images of prints, comparing, specifying the differences then proposing a date order.
So I need to shuffle the available images to check on the similarities and differences.
I do not know what the final order is likely to be until I have shuffled them.
In this screen shot, I want to place the _ept_ image against each of the other images in turn. But I cannot move it from one position to another. And similarly for the other two images. In the general case, there can be up to 8 images to compare (I have 2 screens).
I have the same issue in Excel when I tile 4-5 files. This is an OS issue and not a Photoshop issue. I have learned over time that the selected file goes on the left, so if that one is wrong, then I select it and tile again. For the others, I just drag and drop to reorder them.
You might ask on the Microsoft forums to see if anyone can shed light on this quirky and annoying behavior.