I have configured a screen so when the issue is sent back to development the QA person performing the transition can write a comment providing the reason why it has been sent back to dev. but the comments field in that screen is not required.
how can I make it required for that specific screen?
Did you try to enter a validator to ensure that a comment is added during the transition? This article explains the details:
Hope it helps,
...It's true that there are projects in Jira; but they are merely a way to cut off issues, to tell them apart from other sections of work and to apply rules that are specific to that team (the schemes)....
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