How to edit metadata in QuickSubmit plug-in - ojs 3.0.2

How could I edit meta data of submission if I 've made it via QuickSubmit plug-in. I should add another contributor/author and change pages, but I do not find where I could edit it. I’ve already tried unpublishing the issue, but it did not help.

I’ve found how to edit meta data, but still do not know how to assign page numbers to the article, which was already submitted via QuickSubmit plugin …

For page numbers, see:

Thank you so much for your answer. I found it.