terminate the shower surround at the lower edge of the window, Remove the tile outlined in yellow.

I probably would have ended the tile 12 inches from the ceiling in the entire shower.

The other alternative would be to tile the whole wall with the window.

We have a window that overlaps the shower. The trick is to end the tile either in line with the window trim or just below it so it dies into the side of the window. Either can work depending on how high you need the tile to go. Also consider whether you need this window at all—another option would be to reduce the size so it’s not in the mix at all.

Oh, and however you trim the window, keep it the same throughout. I’d try to add that to this window too—finish just that inside edge with tile on the left half also If you can’t easily remove the tile.

Thanks for the ideas, keep them coming!