Sansa Clip Zip: Backlight settings

[asim0]

Hello eveyone,
I wondered if it is possible to have these settings:
- First Keypress Enables Backlight Only, but only for the back arrow button?
- an option to not turn on backlight when manually skip track

there is this 'caption backlight' option, which translated in french had me confused because I though it would do like my second request, but wasn't.

since I discovered rockbox I haven't used the original firmware a single time, I love it!