Viewing file names

When in grid view a two-finger tap on the grid will display an information overlay on each thumbnail. Continue to two-finger tap and it will cycle through the 6 different overlay states, one of which is "Hide all overlays" and another one will include the filename.

When in Edit or Rate & Review modes, a two-finger tap cycles the info view between Off, Histogram, Photo Info. And when Photo Info is being displayed, a single-finger tap cycles between various info states.