# Multi Copy-Paste Annotations - 3D Polylines, Cuboids, 2D Bbox

The Multi Copy-Paste feature enables users to copy and paste multiple annotations—across annotation types such as 3D polylines, cuboids, and 2D bounding boxes—from one frame to another. This gives users full control over what gets carried forward and where it's placed, unlike auto-propagation. It helps preserve annotation consistency while allowing frame-specific adjustments. This feature is **good**, **fast**, and **lean**—delivering high-quality results quickly, with minimal manual effort.

{% hint style="success" %} <img src="/files/qchq9tcQpS8cX7YBw03I" alt="" data-size="line">  Select different annotations to copy-paste to different sensors or different frames.
{% endhint %}

<figure><img src="/files/840rprgOPfn7QzUXgqqi" alt=""><figcaption></figcaption></figure>

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## Use Cases

* **Autonomous Driving – Lane or Infrastructure Annotations**\
  Use multi copy-paste to carry forward polylines like lane boundaries, road dividers, and vehicles together across sequential frames where scene structure remains consistent or has a slight variation.
* **2D Camera – Highway Vehicle Tracking**\
  On highways, vehicles often move in formation—slightly ahead, behind, or beside each other across multiple frames. Multi copy-paste enables consistent annotation of these vehicles while still allowing you to fine-tune individual boxes as needed, frame by frame.
* **2D Camera – Parking Lot Scenarios**\
  In parking lots, the same set of parked vehicles often appears first in one camera and then in another as the vehicle moves. This feature helps replicate those annotations quickly and adjust them when necessary, improving accuracy across camera transitions.

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## Benefits

* **Good**: Ensures consistent annotation structure and alignment across frames without needing redraw.
* **Fast**: Saves time by enabling bulk duplication and precise placement in a few quick actions.
* **Lean**: Minimizes manual effort and avoids the need for frame-by-frame redraw or overly rigid auto-propagation logic.

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## Steps to Use Multi Copy-Paste Annotations

1. **Create the annotation(s)** on the current frame.
2. Hold **Ctrl** and **select multiple annotations**.
3. Press **Ctrl + C** to copy.
4. Navigate to the next frame.
5. Press **Ctrl + Shift + V** to activate *special paste*.
   * If any copied annotation(s) already exist on the frame, the tool will notify the user.
6. All eligible annotations appear with the cursor on hover.
7. **Left-click** to place them on the frame.

> **Tip:**  You can adjust placement after dropping and edit attributes individually if needed.


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