Move control points

You can move control points to change the shape of your mask.

Drag selected control points

  • Select control points on a mask in the Viewer, then drag the points to a new position.

    As you drag selected control points, the rest of the mask stretches or curves to accommodate the change.

    Canvas showing mulitple control points selected and moved together

    Note: When you drag a control point, the point’s name and coordinates are displayed at the top of the Viewer.

Move a selected control point by one pixel

  • To nudge left: Press Comma (,).

  • To nudge right: Press Period (.).

  • To nudge up: Press Option–Up Arrow.

  • To nudge down: Press Option–Down Arrow.

Constrain the movement of selected control points

  1. Select control points on a mask in the Viewer.

  2. Press Shift while you drag a selected point horizontally, vertically, or diagonally.

    The control point movement is constrained to the horizontal (90-degree), vertical (180-degree), or diagonal (45-degree or 135-degree) axis.

Move control points using the Video inspector

You can make precise adjustments to the position of any control point using controls in the Video inspector.

  1. In the Timeline, select the clip containing the mask you want to modify.

  2. To open the Video inspector, click the Inspector button in the toolbar (shown below), and click the Video button at the top of the pane that appears.

    Inspector button in toolbar
  3. In the Draw Mask section of the Video inspector, click the Control Points disclosure triangle to open the Control Points controls.

    Draw Mask section of the Video inspector, showing the Control Points controls
  4. Make numerical adjustments to the X and Y coordinates for any control point using the value sliders.

Position, rotate, and scale a mask

  1. In the Timeline, select the clip containing the mask you want to modify.

  2. To open the Video inspector, click the Inspector button in the toolbar (shown below), and click the Video button at the top of the pane that appears.

    Inspector button in toolbar
  3. In the Draw Mask section of the Video inspector, click the Transforms disclosure triangle to open the Transforms controls.

  4. Adjust the Position, Rotation, and Scale parameters to precisely define the shape, size, and position of your mask.

Move a mask edge

You can change a mask shape by dragging its edges.

  1. In the Viewer, click any edge of a mask.

    The control points on either end of the line are selected.

  2. Drag the line segment.

    Viewer showing line segment being adjusted

    The distance between the two points remains constant as you drag. Press Shift to constrain the movement horizontally, vertically, or diagonally.