Do you know really your Kobo?
Display cover instead fnac logo
Connect your Kobo to your computer and navigate to Kobo disk to find this
[General] - affiliate=fnac + affiliate=Kobo
Go to More->Settings->Energy saving and privacy
- Automatically go to sleep after & Automatically power off after keep your battery safe.
- Show current read, Show book covers full screen, Show info panel on full screen covers & Indicator light while charging is only useful for aesthetic.