You need to modify the workflow in order to add more statuses/transitions under the Worflow drop down. https://confluence.atlassian.com/adminjiraserver074/working-with-workflows-881683683.html
But to add a comment to an issue you don't need to have a workflow transition for it, as long as you have browse and comment permission in the project.
Assuming you are using the default workflow that look something like this.
The All indicate that it is an global transition, meaning that all statuses can transition to that status no matter what status it is transition from. Note that renaming a status is global, so all workflows that are using that status will be affected.
If your workflow look something like this
And you want to rename the Done transition (circled), you need to remove the existing one and then create a new transition.
Hey everyone! My name is Sarah Schuster, and I'm a Customer Success Manager in Atlassian specializing in Jira Software Cloud. Over the next few weeks I will be posting discussion topics (8 total) to ...
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
We're bringing product updates and pro tips on teamwork to ten cities around the world.Save your spot