There are several view settings, but none are ideal for folders or results that are a mixture of images and non-images because you end up with a lot of giant document icons or previews mixed with images.
This could be solved if there were a new view where certain filetypes (typically non-images) present in a non-thumbnail view, and certain ones (typically images or videos) appear in thumb view. Obviously the two would need to be in sequence so you might have the non-images first.
There are various variations on how it could be done but it would be quite handy if there were some way...

I know you could have two windows open and repeat every search or folder select you do in each with different extensions but if thought about it that's fairly clumsy and also inefficient with screen space, you might for example only have a few documents, whilst this would just put them neatly at the top and use the full space properly.
Cheers, David