It's black already, can't get darker than that. You may use Jeffrey's
configurator to set a bolder font.
Sent from phone.
Well that depends...
Maybe the OP has configured the Library View Options in a manner that the filename is on the second row.
I have Exposure and Exposure Bias on it and indeed: it is hardly readable. Made use of Jeffrey's formidable Configurater (http://regex.info/blog/2007-03-13/395) and managed to get a better look at a lot of things on my screen. But the grey font is just something Adobe should consider changing or make adjustable by the user.
will give it a try.