Plan window background is lets you configure the background color of the "plan window"
The overlay backdrop color covers the whole area when the overlay is toggled into interactable* mode.
    *Interactable means you can move and resize the "plan window"
The overlay default font color is the default color for notes in the plan window

The "plan window" proceeds automatically when you go into the next zone ingame if it matches the next one in the plan.