How to change reference's cardinality
![Image 154](/s/attachments/13484/2/798/d40ecbac42f38c4e53f8eaa02903a9cd.png)
Select a reference.
![Image 155](/s/attachments/13484/2/798/ea1f9a284909e7829c96ef52bb989f36.png)
Go to Reference properties and choose a new cardinality for the reference.
![Image 156](/s/attachments/13484/2/798/7aabb831eb91a4051a84387f384de812.png)
Let’s change it from 0..* to 1..*
![Image 158](/s/attachments/13484/2/798/636d896f9f59f81cbf526d89932c7a6c.png)
A cardinality change may also be seen in a line’s appearance.
![Image 157](/s/attachments/13484/2/798/1a8062228338980dc482b4908897da49.png)
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