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Set Node Icons

Simply click on the empty icon tile of a node and choose the icon from the menu!

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Change the layout

You can move the nodes anywhere and resize them as well to update the layout the way you want.
You can also click at the color menu at bottom right corner and change the color!

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Visual Hierarchy

Systems usually have levels and contain components inside components. To achieve the same look in metz, you can use folders!
The folder hierarchy determines the visual hierarchy on playground.