Hi Christine,
I think from what you're saying, you'll need to access "Field Management" in "Admin", find the field and adjust its "block" settings"
Explanation with screenshots here in this article
https://community.marketo.com/MarketoArticle?id=kA050000000KypCCAS
Also another community discussion with extra info
https://community.marketo.com/MarketoDiscussionDetail?id=90650000000Q1DYAA0