True story, that's why I said you're probably in the back seat if the pressure is under the arch of the foot. It would probably have been clearer if I said ''if the center of pressure is under the arch of your feet, you're probably in the back seat''. Thank you for clearing it up. Nevertheless, I like to keep shin pressure and apply pressure on the ball of my foot and not on the arch. To me it feels like I can bend the ski more that way, of course what something feels like is subjective.
EDIT: On a sidenote for Karlsson. What also really helps to create angles in my opinion is training balance on a swiss ball. Buy a swiss ball and practice standing on the swiss ball for 10 minutes everyday, this will improve her balance/stability greatly and this will translate into bigger angles and better and faster skiing. First practice standing on the swiss ball from the knees, when she's capable of doing that, practice standing on the swiss ball from the feet. I know it worked for my skiing and this is an exercise ALL world cup athletes do.
^This is what it looks like.
I like to "bus ski" on the way to the hill if the driver doesn't tell me to "sit down back there". You need to get fore when they hit the brakes through flexion, extend as the bus accelerates, you need foot to foot pressure for when the bus rocks side to side and you have to face the forces and align over the 'outside ski' with long leg \ short leg when the bus turns.