Adding a Callout is not available to standard registered users.
There are an increasing number of stakeholders posting to the Community and in order to create dynamic and easily-consumable posts, I find the Callout feature to be really useful but only Admins can use it.
I recall some Moderation changes are on the Roadmap, perhaps this ability can at least be given to those trusted to moderate certain community areas? If not, for all?
CC