Hey,

I don't know if this is just me or anyone else experiencing this problem or not but only 4 out 6 of my powers are being shown on my spell action bar. I just notice this now when i am on the chapter "The light at the end" on my first play through. Possession and windBlast are not appearing on my spell action bar

You can put whatever you want on your "spell action bar". Just hold down the "Quick-Access Wheel" key (middle mouse button) and choose the power of your choice and press the hotkey number you want to give to it.