You can modify the appearance of your clip by cropping, rotating, or scaling.
To make these types of adjustments, select the clip in the timeline and open the Crop & Rotate panel. The adjustment settings are grouped into Basic and Advanced controls.
Premiere Rush automatically fills the frames when the aspect ratio of imported media does not match aspect ratio of the sequence. This is applied to all imported media by default, and prevents black bars on the sides of your videos.
You can also manually fill frames by using the Fill or Fit options in the Transform panel.
Double click the clip in the timeline panel to open the Transform panel. Select either Fill or Fit to automatically fill to frame.
Fill - This option adjusts the frame to scale height.
Fit - This option adjusts the frame to scale width.
Position the timeline playhead over a clip to select it, and then click Crop & Rotate. Use the Basic transform controls to adjust position, rotation, opacity, and scale.
The Advanced transform controls allow you to adjust Crop and Appearance settings for your video clips. Cropping the top or bottom of an image—or both—can help you transform a standard video into a widescreen look. The Appearance controls allow you to adjust edge feathering.
Reset to default
The Basic and Advanced transform controls have separate Reset to Default buttons.