@Whalefat (View Post)
The little white circle Lower Right, just before new save.

Press the botton that says "simulation options" (the one which is next to the paper symbol), then search "Newtonian gravity" and press the square.

At the bottom of the screen there is a little box with a black cheakmark inside a white circle. With you're mouse, left-click that box. When clicked, a box with 5 options will appear, three above a white line, and 2 below. The 3 options above the white line is what you need to focus on. There is a sentence that says Newtonian Gravity Introduced in version 48.May also cause slow performance on older computers. and a square that is to the right of the sentence. left-click this square. a black cheakmark inside a gray circle should (magicly) appear in the box. At the very bottom of the "window" there is a rectangle with the word ok in it. Left-click this rectangle. Newtain gravity is now enabled on the powder toy for you. But you will have to go though the same prosses if you want to turn on Newtain gravity after you closed and reopean the powder toy.