The system provides a reverse matte switch to invert the visible area and has opened keyframe control tracks for the matte enable status and reverse parameters.
[Operation] ① One-click invert: In the properties panel of the target media with Track Matte enabled, turn on the "Reverse" switch. The visible area of the frame will instantly flip (e.g., the inside of the text becomes transparent, and the video is shown outside the text); ② Create dynamic flips: Move the timeline playhead to the starting frame of the matte animation and click the diamond icon next to Reverse to set the first keyframe; ③ Move the playhead to the ending frame of the action and toggle the Reverse switch status to generate the second keyframe. The system will automatically generate a dynamic hard cut or state transition for the matte inversion.
[Verification] Drag the playhead to play back. The footage accurately executes the reverse matte switch upon reaching the keyframe timestamp, and the preview window has no flickering and matches the final exported frame perfectly.
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