You can change the relative order of elements that overlap each other on a diagram. Applying Bring to Front to an element will ensure that it always appears on top when another element overlaps it. Similarly, Send to Back will ensure that the element always appears beneath any overlapping elements.
To bring elements to the front of the diagram:
Right-click the diagram element that is overlapped by another element, then choose Bring to Front.
OR
Select the diagram element that is overlapped by another element,
then choose Model
Bring to Front.
To send elements to the back of the diagram:
Right-click the diagram element that is overlapping another element, then choose Send to Back.
OR
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