Since the number 1 is at the bottom left, the mouse pointer will move slightly down and to the left if you press it. If you press 9, the pointer will instead move slightly up and to the right.

NeatMouse for Windows can help you move the Mouse Cursor using Keyboard efficiently. You can use keyboard to control pointer or cursor of mouse.

Reduce your reliance on your mouse by using your head, by enabling Head Pointer in macOS to move your cursor and click icons by shifting your skull from side to side.

Android’s new mouse keys feature will let you move the pointer by pressing keys on your keyboard ...