User must be able to define their own libraries and there must be support for system and 3rd party component libraries too.

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User needs easy-to-use UI to manage component libraries, the actions done are:

• list,
• add
• remove
• enable
• disable

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When library has been activated and enabled, the contents of that library appear in the context menu. If there is no category for certain new component it will be enabled as visible in context menu as long as the library is enabled. When the library is disabled, the assiciated component library is removed from context menu.

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Libraries can contain 3D and 2D objects.

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