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Use the code view feature to look at the underlying code for each control on your app's screens. The code uses an improved format that's a subset of YAML.
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- Copy the code for a control and share it outside of Power Apps Studio.
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- Paste the code for a control and create a new control based on it.
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> [!IMPORTANT]
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> - This is a preview feature.
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> - Preview features aren't meant for production use and might have restricted functionality. These features are available before an official release so that customers can get early access and provide feedback.
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> [!NOTE]
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> Since this is a preview feature and the format is subject to change. We don't guarantee compatibility with the final version.
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> The current code format seen in the code view isn't suitable for source control during the preview period.
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## View, copy, and paste code
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Code view shows the code for the selected control and all its child controls.
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Code view lets you copy and paste code to any screen in your app, or outside of Power Apps, to duplicate the control. This duplication feature is helpful when controls are highly customized and you want to share or duplicate it.
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Code view lets you copy and paste code to any screen in your app or outside of Power Apps to duplicate the control. This feature is helpful when controls are highly customized and you want to share or duplicate them.
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### View code
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1. Open your app for [editing](edit-app.md) in Power Apps Studio.
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1. Right-click the control in the tree view or on the screen, and then select **View code (preview)**.
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1. Right-click the control in the tree view or on the screen, and then select **View code**.
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:::image type="content" source="media/code-view/view-code.png" alt-text="Screenshot of the tree view in Power Apps Studio, with the View code option on a control's context menu highlighted.":::
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### Copy and paste code
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1. When viewing your code in the code view popup, select **Copy code**.
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1. Share it or paste it to create a duplicate of the selected control:
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1. To copy the code of a selected control:
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- Use the menu to copy.
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- Use the shortcut <kbd>Ctrl</kbd>+<kbd>C</kbd>.
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- When viewing your code in the code view popup, select **Copy code**.
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1. To add a new control from the code:
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- To share it, paste the copied code in any window.
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- To add a new control from the copied code, right-click the screen where you want to add the new control, and then select, **Paste code (preview)**.
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- Use the menu to paste.
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- Use the shortcut <kbd>Ctrl</kbd>+<kbd>V</kbd>.
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:::image type="content" source="media/code-view/paste-code.png" alt-text="Screenshot of the tree view in Power Apps Studio, with the Paste code option highlighted on a control's context menu.":::
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> [!IMPORTANT]
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> You must use the YAML format that Power Apps Studio generates. The code is validated before the new control is created.
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> Use the YAML format that Power Apps Studio generates. The code is validated before the new control is created.
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## Known limitations
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- You can't copy and paste or view the code for the **App Object**.
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- You can't edit the code in the code view.
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- You can only copy controls that are on a screen. You can't copy a screen.
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- When you paste code, the new control is positioned at coordinates X=40, Y=40. In the future, the X and Y properties that you set are respected.
Use the source code for a canvas app to review changes made by makers in Power Apps Studio. The generated canvas app YAML code is read-only and can't be modified. Any changes to the file are ignored and might be lost.
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You can use the source code for a canvas app to review changes made my makers in Power Apps Studio. The generated canvas app YAML code is read-only and shouldn't be modified. Any change in the file will be ignored and can be lost.
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> - The YAML schema is in active development, and the content might be incomplete.
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> - The current static schema for ***.pa.yaml** files is available [here](https://raw.githubusercontent.com/microsoft/PowerApps-Tooling/refs/heads/master/schemas/pa-yaml/v3.0/pa.schema.yaml).
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Currently, we don't recommended that you modify **pa.yaml** files or create canvas apps using other text editors. However, more scenarios will be supported in the future.
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> [!NOTE]
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> - The YAML schema is in active development, the content may be incomplete.
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> - The current proposed static schema for ***.pa.yaml** files can be found, [here](https://raw.githubusercontent.com/microsoft/PowerApps-Tooling/refs/heads/master/schemas/pa-yaml/v3.0/pa.schema.yaml).
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We use Power Fx and YAML as the languages for Power Apps source code. YAML is appreciated for its human-readable format and benefits from a wide array of existing editors, tools, and libraries for its manipulation.
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## Prerequisite
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To use this feature, you must create an [Early release cycle environment](/power-platform/admin/early-release).
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Power Fx and YAML are the languages used for Power Apps source code. YAML is valued for its human-readable format and benefits from a wide array of editors, tools, and libraries for manipulation.
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## Access source code files
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The Power Apps Studio creates the source code for canvas apps, which is stored as *.pa.yaml files within the **.msapp** file. The **.msapp** file is a binary file that contains a collection of files, including the source code.
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> [!TIP]
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> To effectively use ALM, it's recommended to use solutions. [Canvas apps package](export-import-app-package.md) doesn't support ALM and should only be used for basic import and export capabilities when Dataverse isn't available.
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> To effectively use application lifecycle management (ALM), it's recommended to use solutions. [Canvas apps package](export-import-app-package.md) doesn't support ALM and should only be used for basic import and export capabilities when Dataverse isn't available.
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You can also get the source code files either from the **.msapp** file or by using [Power Platform CLI](/power-platform/developer/cli/introduction).
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Only ***.pa.yaml** files within the **\src** folder can be used as source code. Any other file shouldn't be used as source code.
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## Power Fx YAML
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Microsoft Power Fx utilizes a grammar for expressions that is based on Excel and well-established. However, when using Power Apps and other hosts that rely on UI for formula binding, there's no standardized method for editing formula bindings as text.
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We choose [YAML](https://yaml.org/spec/1.2/spec.html) as the industry standard language for formula binding. YAML has a wide array of editors, tools, and libraries available for working with it.
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> [!NOTE]
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> Currently, we only support a limited subset of YAML. Only the constructs outlined in this article are supported. More information: [Power Fx YAML formula grammar](/power-platform/power-fx/yaml-formula-grammar).
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## Power Apps YAML schema versions
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Currently there are three schema versions of Power Apps Source Code:
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Currently, there are three schema versions of Power Apps source code:
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|Format Name|File Extension|Description|
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|Format name|File extension|Description|
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|-----------|-----------|-------|
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|[Experimental](power-apps-yaml.md#experimental-format-fxyaml)|*.fx.yaml| Version used by the experimental [Power Apps Git version control](git-version-control.md) and [pac canvas unpack](/power-platform/developer/cli/reference/canvas#pac-canvas-unpack) - no longer in development.|
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|[Early Preview](power-apps-yaml.md#early-preview)| - | The version used by code view, copy code, and paste code. There's no version information in this schema, therefore it isn't suitable for version control. When [code view](code-view.md) is generally available (GA), it switches to the source code preview format.|
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|[Source Code](power-apps-yaml.md#source-code-payaml)|*.pa.yaml files | Includes enhancements and version details for source control and it is in active development. |
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>[!NOTE]
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> You can't copy YAML code from a pa.yaml file and paste it as code in Power Apps Studio. However, in the future, code view will utilize the source code format for this purpose.
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|[Experimental](power-apps-yaml.md#experimental-format-fxyaml)|*.fx.yaml| Version used by the experimental [Power Apps Git version control](git-version-control.md) and [pac canvas unpack](/power-platform/developer/cli/reference/canvas#pac-canvas-unpack)—no longer in development.|
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|[Early preview](power-apps-yaml.md#early-preview)| - | The version used by code view, copy code, and paste code. There's no version information in this schema, so it isn't suitable for version control. When [code view](code-view.md) is generally available (GA), it switches to the source code preview format.|
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|[Source code](power-apps-yaml.md#source-code-payaml)|*.pa.yaml files | Includes enhancements and version details for source control and is in active development. |
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## Experimental format (*.fx.yaml)
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This schema represents an experimental format employed by the Power Platform CLI to process and convert canvas apps into a source code format. However, this format is no longer being actively developed.
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This schema describes an experimental format used by the Power Platform CLI to process and convert canvas apps into a source code format. This format isn't actively developed anymore.
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You can't directly convert ***.fx.yaml** files to the new formats. To convert older apps, you need to package the canvas app as a **.msapp** file and import it into Power Apps Studio.
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You can't directly convert ***.fx.yaml** files to the new formats. To convert older apps, package the canvas app as a **.msapp** file and import it into Power Apps Studio.
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## Early Preview
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## Preview
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This version is used by [Code view](code-view.md). Is designed to create apps within Power Apps Studio, letting you easily copy and paste controls. In this version, the source code is used in Power Apps Studio instead of being converted (like the experimental format).
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This version is used by [Code view](code-view.md) during the [preview](working-with-experimental-preview.md#preview) period. It is designed to create canvas apps in Power Apps Studio, letting you easily copy and paste controls. In this version, the source code is used in Power Apps Studio instead of being converted, like the experimental format.
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The Early Preview format is a preview feature and is temporary. In the future, both code view, copy code, and paste code are going to use the same source code version.
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The format during the preview was temporary and is no longer in use. You can paste code from the preview format.
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Here are the changes made from the experimental format:
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1.**ZIndex Property Removal**: The ZIndex property is removed. Instead, a screen is now represented as an array of controls. The order of controls now determines their stacking order. Normal controls are ordered in ascending order, while responsive controls are ordered in descending order.
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1.**JSON Object Representation Replacement**: We no longer use the "As" syntax to define the control type. Instead, the left side of the control's name identifier remains unique. Only properties that differ from the default values are serialized. Two new properties are added to define the control type and default values:
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1.**ZIndex property removal**: The ZIndex property is removed. Instead, a screen is represented as an array of controls. The order of controls determines their stacking order. Normal controls are ordered in ascending order, while responsive controls are ordered in descending order.
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1.**JSON object representation replacement**: The "As" syntax is no longer used to define the control type. Instead, the left side of the control's name identifier remains unique. Only properties that differ from the default values are serialized. Two new properties define the control type and default values:
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-**Control**: Represents the control type in YAML.
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-**Variant**: Identifies a variant of a control type, which might alter default property values, add or remove properties, or modify the behavior/layout of the control.
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-**Variant**: Identifies a variant of a control type, which might alter default property values, add or remove properties, or modify the behavior or layout of the control.
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These properties are used for instantiating controls and don't accept Power Fx expressions.
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## Source code (*.pa.yaml)
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> [!IMPORTANT]
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> - The YAML source code for canvas apps is currently in preview and actively being developed. The content may be incomplete and subject to change.
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> - The YAML source code for canvas apps is actively being developed. The content may be incomplete and subject to change.
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> - The **.pa.yaml** files are read-only and should only be used to review changes made in Power Apps Studio. These files are not used when an app is loading.
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> - External editing, merging, and conflict resolution isn't supported.
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This schema is designed for source control purposes and allows the use of a single YAML file. It's an updated format compared to the previous code view.
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This schema is designed for source control purposes and allows the use of a single YAML file.
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Updates from the previous format include:
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1. Grouping of Top-Level Node Elements:
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- The top-level keywords "App" and "Screens" are examples of how elements are now grouped in a top-level node.
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2. Control Version Specification:
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- You can now specify the version of a control using the Control Keyword followed by the **@** operator. If no version is specified, the most current version of the control is used.
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- You can now specify the version of a control using the Control Keyword followed by the **@** operator. If no version is specified, the most current version of the control is used. The version is used to deserialize the properties of the source code. Runtime version of the control is defined by the authoring version.
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