The layout of each power grid on each tab is always saved as the default, even if you turn the computer off, but you can also save five additional layouts for the Schedule grid by clicking the '+' button to the right of the 1-2-3-4-5 icons.
Select a button number for your layout, and create your own fly-by hint to remind yourself what the layout is all about. The button number is linked to one of the 1-2-3-4-5 icons. Hover there to display the hint and press it to restore the saved grid layout.
