Another alternative is to provide the resistor pads but connect them with a thin trace on the PC board. If you need to use the resistor pads you can cut the trace.[/color]
Yes, through hole resistor pads would be great.
Another alternative would be to reverse it.
Use a resistor but have a parallel trace with an open solder jumper on the board.
That way the LED is never overdriven but if the backlight is too dim because the users LCD
already has a resistor on its module, the user could solder closed the jumper pad to connect
the traces to bypass the resistor.
At the moment I have no backlight resistor on the design,
Most designs are like that: it provides the broadest means for the user to control the brightness of the display.
How is no resistor providing the broadest means?
I've got an i2c lcd backpack with no resistor between the transistor and the Anode
and to add one is a real pain.