Hello,

1. Those brands come from Theme Settings -> Footer -> Prefooter: https://prnt.sc/xeI7spNykmaK

2. Please clarify which exact size guide you mean (send some screenshots)

3. Enable this https://prnt.sc/BQOvemc86NmH option in the header settings to make the same effect as on the demo.

4. Send some screenshots for a better understanding, please.

Thank you for your time.

Kind Regards