Laptop display brightness adjustment keys

[Matt Connell]

On Wed, 2023-06-28 at 12:09 -0400, Matt Connell wrote:
> Is there a setting I can create/add for the scaling?

It appears not.

$ xfconf-query --channel xfce4-power-manager --list
/xfce4-power-manager/brightness-switch
/xfce4-power-manager/brightness-switch-restore-on-exit
/xfce4-power-manager/critical-power-action
/xfce4-power-manager/general-notification
/xfce4-power-manager/handle-brightness-keys
/xfce4-power-manager/hibernate-button-action
/xfce4-power-manager/inactivity-sleep-mode-on-battery
/xfce4-power-manager/lid-action-on-ac
/xfce4-power-manager/lid-action-on-battery
/xfce4-power-manager/logind-handle-lid-switch
/xfce4-power-manager/power-button-action
/xfce4-power-manager/show-tray-icon
/xfce4-power-manager/sleep-button-action