Brother HL-2400C Service Manual page 470

USER'S GUIDE
4–76
Notes
The message "PRINT FONTS C" or "PRINT FONTS P" appears only
when the optional font card is installed in the font slot or permanent
download fonts are stored in printer memory.

If the optional font card is installed, you can print out the list of
optional fonts. Since the list shows the ID numbers specific to each
optional font, it helps you to select them with the Font button.

If user-defined characters are already downloaded into the printer
memory as permanent download fonts, you can print out the list of
them. For further information, see "FONT Button" in Chapter 4 and
Technical Reference Manual that is optionally available.
4. Press the Set button to make the displayed selection effective.
The printer prints out the test patterns or lists according to the selected
test mode.
Note
The printed list shows the panel button settings you have made as user
settings with the Mode button. See "SAVE SETTINGS" in Chapter 4.
When the printer finishes printing, it automatically exits from the test
mode to the off-line state.