Just press "select". It switches between big icons with actual filename, big icons with header information, small icons with header information and no icon with actual filename.
Yea, that's not it. R4isdhc has that too, but at least some of the dstt clones also include a magnifier to show all roms in the current folder as squares in a large 24x(16?) grid, so you can quickly go directly to what you want. Can't readily find a picture/video online to show you. In any case, that part works well enough for me. I do wish you could launch from that zoom out view instead of having to zoom back in first.