In the diagram, a thick blue arrow stands for page transition, a black arrow stands for card invocation, and an orange dotted arrow stands for field reference.
在图中，蓝色的宽箭头表示页面转换，黑色箭头表示卡片调用，而桔红色虚线箭头则表示字段引用。
2
Click and drag the incoming arrow from the element to an empty diagram location.
点击引入的箭头，从元素拖拽到一个空图位置。
3
The double-lined arrow in the diagram is an alternative notation that shows a unit being hosted on another unit.