So whenever I hit my dim/brighten keys on the keyboard, a notification bubble pops up with the screen brightness. All that's fine, but I would like to be able to change how much the brightness changes with each key press.

For example, right now it takes just 5 presses to go from the completely dark to the brightest setting. However, I know from the "Brightness/Lock" setting that the screen is capable of much smaller intervals than this.

Is there a way to change how much the brightness jumps each time the keys are pressed?