Start by selecting the Effects Workspace
Position: moves your video left/right or up/down.
Scale: increases or decreases the size. If you wanted your video to scale only horizontally or vertically, you can uncheck Uniform Scale and have access to those adjustments.
Rotation: adjusts your 2d-rotation of the video left or right, depending on the direction you drag the number.
Anchor Point: adjust the point from which your video scales, moves, or rotates.
Anti-flicker Filter: allows you to eliminate flicker that tends to occur when putting images in your timeline that have sharp lines.
click on effect controls panel on the left if not selected
You can reset any of your Motion changes by clicking on the reset icon to the right of the property you changed.