XYplorer Beta Club

It's undocumented, as far as I can see.
Let's say you do a Selection Filter (CTRL+M) using "*:jpg" but you also want to see them all put together prior to do whatever you want with those files.
Easy: Enable Tools > Customize List > Manual Sorting. Then, drag one of the selected files one position above/below of its current position on the list. Done: they will all be sorted together. Works also for multiple entries, like:

That's right, they will be inserted as a solid block. I think it was slightly documented with Manual Sorting.

I achieve a similar effect easier using a scripted Visual Filter mapped onto an alias @vfs:

Admin: -assuming you already have a well defined selection...
-which I find harder to manage also because of the lack of a way to append stuff later...
CTRL+M is more fluid to me.
Thanks for the tip, anyway!