You can't do this on Cloud.
You could ask Atlassian support to enable the flag on your instance. Raise it at https://support.atlassian.com (I don't think they'll do it, but it does not harm to ask, and the worst case is a polite "no" from them)
Hi my Community friends! For those who don't know me, I'm a product marketer on the Confluence Cloud team - nice to meet you! For those of you who do, you know that I've been all up in your Co...
Connect with like-minded Atlassian users at free events near you!Find a group
Connect with like-minded Atlassian users at free events near you!
Unfortunately there are no AUG chapters near you at the moment.Start an AUG
You're one step closer to meeting fellow Atlassian users at your local meet up. Learn more about AUGs