Epson LT-286 - Manual (Page 45)

In the submenu (the lower box), a black, gray, or white tone
appears next to the word
Black.
That tone is currently associated
with the color black. If you are satisfied with that tone, press the +
key to move to the next color. If you want to use a different gray
tone for black, press Enter. The following display appears:
4.00 (c) 1988
1
2
3
4
5
6
7
change
0
Use and to highlight the gray tone that you would like to use
for black, then press
Enter. The submenu shown in the preceding
figure then reappears, showing your latest gray tone selection for
the color black.
Next, press the + key. The name of another color appears, along
with the gray tone currently associated with that color. To assign a
different gray tone to that color, press Enter and follow the
procedure described in the last paragraph. To move to the next
color, press the + key again.
Running the Setup Program 2-11