Detrimental Effects

Choose an icon size from the spin control. If you prefer your Detrimental Effects window to be very small on screen, you can choose Mouse wheel scrolling. When you have more detrimental icons than will fit in the window, you can use the mouse wheel inside the window to scroll the icons into view, a few at a time.

Think of mouse wheel scrolling as an invisible scrollbar. If you use the wheel and the icons spin completely out of view, it means your window is large enough to display all of the icons, and you would be better served to turn off the scrolling feature.