Hello,
I saw the screenshots you attached.
1) To edit the prefooter area you need to edit the HTML block used in the pre-footer area under Theme Settings >> Footer >> Pre-Footer text.
Then you need to edit the HTML Block from Dashboard >> HTML Blocks.
Screenshot for Clarification: https://ibb.co/qn73JMf
2) To edit the footer elements you need to Go to Appearance >> Widgets >> Footer columns.
Screenshot for Clarification: https://ibb.co/c3zzMt8
Best Regards.