In the Chests section of the Inventory, select a chest you want to open. Then press the Open button. You can open several chests of different types.
When you close the Inventory, a window listing all the items you got from the opened chests will appear. They will be added to the corresponding sections of your Inventory and collections.
When you close the Inventory, a window listing all the items you got from the opened chests will appear. They will be added to the corresponding sections of your Inventory and collections.