Problem definition: 

In the new issue view the user doesn't have the option Export this issue in another format as it was available in the old issue view.

1. Select a project.
2. Chose Issues and filters.
3. Select an issue.

Suggested Solutions:

Create for the new issue view a way to export in another format.

Workaround:

Create a search JQL like Issuekey = NP-6 (example), in Search issues and export.

1. Navigate to Issue and filter.
2. Select Search issues.
3. Write a JQL like Issuekey = NP-6.
4. Export in Export this issue in another format.