Clip

This effect trims rows of pixels off the edges of a clip, replacing the trimmed areas with a specified background color. Use this effect to trim away noise and pixel skew that may result from overscanning during digitizing. If you want Adobe Premiere to automatically resize the trimmed clip to its original dimensions, use the Crop effect instead of the Clip effect.

Left, Top, Right, Bottom Crops each edge of the clip separately.

Units Sets the units specified by the sliders, either pixels or the percentage of the frames.

Fill Color Specifies the color that replaces the trimmed areas. The default color is black.

Applying Effects > Video effects included with Premiere > Clip