Change transition settings

In a Timeline panel, click a transition to select it.
In the Effect Controls panel, adjust settings:
Edge selectors

Change the orientation or direction of the transition. Click an Edge selector arrow on the transition’s thumbnail. For example, the Barn Doors transition can be oriented vertically or horizontally. A transition doesn’t have Edge selectors if it has one orientation or if orientation isn’t applicable.
Start and End sliders

Set the percentage of the transition that is complete at the start and end of the transition. Hold down the Shift key to move the start and end sliders together.
Show Actual Sources

Displays the starting and ending frames of the clips.
Border Width

Adjusts the width of the optional border on the transition. The default Border is None. Some transitions do not have borders.
Border Color

Specifies the color of the transition’s border. Double-click the color swatch or use the eyedropper to choose the color.
Reverse

Plays the transition backward. For example, the Clock Wipe transition plays counterclockwise.
Anti‑Aliasing Quality

Adjusts the smoothness of the transition’s edges.
Custom

Changes settings specific to the transition. Most transitions don’t have custom settings.