This idea has been merged into another idea. To comment or vote on this idea, please visit APP-I-5367 Make mockup able to link to more than one feature/release/requirement.
Currently, mockups can be inserted into the text field where they have been created at.
When a feature has more text fields (custom fields), one might want to use the mockup in more than the field it was created for. Thus, it would be necessary to be able to insert the image from a different text field of the same feature.