I like to use the Courier face for filenames because you can read the letters clearly. There is some (but very slight) difference between a one (1) and a lower-case L (l). The serif on the numeral is curved. Or just cut-and-paste the line from my post
I'll agree with that first one! But OMG, I never realized what the difference was, until you pointed it out. Oy. Still very hard to see, but the one has a slight slant/curve to it, and the L is straight...thanks for that! ;-> Or, yeah, one could do cut-and-paste, too... Uwk