Epic

Delete Epic

Backlog >>> Epic (or press E) >>> toggle Epic list view >>> Click on Epic Name >>> View all details >>> Three dots up on the menu `...` >>> Delete

Subtask

Source

Configuration

You need to explicitly enable subtask in Jira to start using the feature

Gear icon (settings) >>> Issues >>> Add Issue Type >>> Fill out the form (Type = Sub-Task Issue type) >>> Add

When to Use It

Way of splitting the issue into smaller chunks or allow various aspects of an issue to be assigned to different people

How to Create It

1. Open the issue you'd like to be the parent issue
2. Select the [✓]] create subtask icon under the title of the parent ticket
3. Add an issue summary and select Create