Mixing : Automation : Cutting, Copying, and Pasting Automation : Tips for Cutting, Copying and Pasting Automation

Tips for Cutting, Copying and Pasting Automation
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On audio tracks, when you are in Waveform View and cut or copy a section of the waveform, any automation data associated with the waveform is also cut or copied.
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On audio tracks, when you are in Waveform View and cut audio data from a track also containing automation data, breakpoints are automatically created at the boundaries of the remaining automation data.
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On audio tracks, pasting waveform data also pastes any associated automation data.
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On Auxiliary Input, Master Fader, or Instrument tracks, only the displayed automation data is cut or copied. To cut or copy all automation data on these types of tracks, press Control while cutting or copying.
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In tracks where an automation playlist contains no data (when there is only a single breakpoint at the very beginning of the track), if you cut data, no new breakpoints are created.
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In cases where clips overlap (such as when moving clips in Slip mode) and an overlapping clip is removed, any overlapped automation breakpoints are lost.
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If cut or copied data contains a type of automation not currently on the target track, Pro Tools prompts you before allowing you to paste the data.
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Cut or copied automation data for plug-ins or sends that do not exist on the target track is ignored when pasted.