Click the Sprites tab and click + extension at the bottom of the blocks area.
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The Extension center window is displayed.
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Extension status

An extension is in one of the following states:

(1) Ready to go

In the Extension center window, if an extension is shown as follows, it can be directly added.
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(2) Update available

If an extension is shown with the icon Instructions for Extension Center - 图4 in the upper right corner, a new software version is available and you can click the icon to update it.
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(3) New extension

If an extension is shown with the icon Instructions for Extension Center - 图6 in the upper right corner, it is newly supported by mBlock 5 and you can click the icon to download it.
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(4) Extension added

If an extension is shown with Delete at the bottom, it is already added and you can delete it.
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Add or delete extensions

Add an extension

  1. Click + Add at the bottom of the extension.
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  2. After being added, the extension and its blocks are displayed in the blocks area.
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Delete an extension

Click Delete at the bottom of the extension in the Extension center window.
image.png :::info Note: After updating or adding an extension, you need to restart mBlock 5 to enable the extension to take effect. :::

Create an extension

Click Create Extension in the upper right corner to enter Extension Builder.
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For details about how to use Extension Builder, see Extension Builder Developer Documentation.