You can add one or more Flags to a contact based on the Flags that your organisation has created.
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Steps
Go to the Contact Profile page of the contact you want to add a flag to
Scroll down until you see the Flags box on the left side
Press the Add a Flag button
This allows you to select a type of Flag
Choose it and enter a description that outlines why this Flag is being assigned to this contact
Press save
The flag now exists on that Contact and will appear next to the name of the contact on the
Contacts App
Event pages