It's not a custom field, it's a system field. It's global, so you can only have one.
When you're adding fields to a *screen* it will be on the list. Once it's added, you need to make sure your users have the rights to add/update attachments too, or it will be hidden from them (in the permission scheme)
I’m a designer on the Jira team. For a long time, I’ve fielded questions from other designers about how they should be using Jira Software with their design team. I’ve also heard feedback from other ...
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