# Crop

Crop lets you isolate a specific region of the input frame so that only that area is analysed by scopes and QC tools. This is especially useful when monitoring a **Screen Capture** source where the application window occupies only part of the screen, or when you want to focus analysis on a particular section of the image.

<figure><img src="/files/FJNXYRTjXAMPouAUfOi3" alt=""><figcaption><p>Crop overlay with position, dimensions, and aspect ratio</p></figcaption></figure>

## Opening the Crop Window

There are several ways to open crop:

| Method           | Action                                           |
| ---------------- | ------------------------------------------------ |
| **Menu**         | **View > Crop…**                                 |
| **Keyboard**     | **⌥C** (macOS) / **Alt+C** (Windows)             |
| **Input strip**  | Click the **crop icon** on the input thumbnail   |
| **Context menu** | Right-click an input source and select **Crop…** |

When crop is active, the full-screen overlay shows the current frame with draggable crop handles.

## Using Crop

1. **Open** the crop window — the full source frame is displayed as an overlay
2. **Drag the edges or corners** to adjust the crop region
3. **Drag inside** the crop rectangle to reposition it
4. The overlay displays the **position** (X, Y), **dimensions** (W, H), and **aspect ratio** of the cropped area in real time
5. Click **Apply Crop** to confirm, or **Reset** to restore the full frame

## Keyboard Shortcuts

| macOS | Windows | Action                             |
| ----- | ------- | ---------------------------------- |
| ⌥C    | Alt+C   | Toggle crop window                 |
| ⌥R    | Alt+R   | Reset crop                         |
| ESC   | ESC     | Close crop window without applying |

## Per-Input Crop

Crop settings are saved **per input source**. Each connected input can have its own independent crop region. When switching between inputs or loading layouts, crop settings are restored automatically.

You can toggle crop on or off for a specific input slot using the **Toggle crop** action in the [Action Editor](/nobe-omniscope/action-editor.md) or [StreamDeck](/nobe-omniscope/streamdeck/available-actions.md).

## Crop and Snapshots

By default, snapshots include the crop. From version **1.11.9+** you can choose to take snapshots **without** the crop applied — useful when you want to capture the full frame for reference while analysing a cropped region.

## Common Use Cases

* **Screen Capture monitoring** — crop to the video player or NLE viewer area and ignore the rest of the screen
* **Letterbox / pillarbox removal** — crop out black bars to get accurate scope readings of the active picture only
* **Region-of-interest analysis** — focus waveform, vectorscope, and histogram analysis on a specific area of the frame (e.g. skin tones, sky, shadows)

## Related

* [Screen Capture](/nobe-omniscope/sources/screen-capture.md)
* [Keyboard Shortcuts](/nobe-omniscope/settings-and-preferences/keyboard-shortcuts.md)
* [Available Actions](/nobe-omniscope/streamdeck/available-actions.md)


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