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The Canvas Group can be used to control certain aspects of a whole group of UI elements from one place without needing to handle them each individually. The properties of the Canvas Group affect the GameObject it is on as well as all children.
|Alpha||The opacity of the UI elements in this group. The value is between 0 and 1 where 0 is fully transparent and 1 is fully opaque. Note that elements retain their own transparency as well, so the Canvas Group alpha and the alpha values of the individual UI elements are multiplied with each other.|
|Interactable||Determines if this component will accept input. When it is set to false interaction is disabled.|
|Block Raycasts||Will this component act as a collider for Raycasts? You will need to call the RayCast function on the graphic raycaster attached to the Canvas. This does not apply to Physics.Raycast.|
|Ignore Parent Groups||Will this group also be affected by the settings in Canvas Group components further up in the Game Object hierarchy, or will it ignore those and hence override them?|
Typical uses of Canvas Group are: