I did write a guide for the Titan skin, to add an extra button in the power options menu, to reboot to Android
I'll have a look for it later, unless someone else can post a link
Found it.
This will vary from skin to skin. I use Titan for krypton beta
Skin Settings, Configure shortcuts, Customize power menu, Add, Change Action, Custom item, then type in System.ExecWait("/usr/sbin/rebootfromnand")
Then set label, call it whatever, reboot to nand, reboot to internal, Reboot to Android.
Set Thumbnail, & select an icon or whatever you want.
Hopefully that is correct, I did find it was slow to reboot. So give it time