I want to place a simple text in the form of banner on top of the header in the experience builder, Is it possible?

I just need to display a text,

I am not able to place anything on top of the header at the moment

I have a Screenflow that has a lot of checkboxes in it. Im using Sections to group checkboxes together and have compoenent visability on them so they only show if I need them to. I set the Default value to False, but if the componenet doesent show it makes it null and it fails the Update of the record. 

I cannot use the Decision solution, to check if Null then change it the False because of the amount of checkboxes I have. 

Any Suggestions to make this work would be great!

Doing the Beginner Dev: https://trailhead.salesforce.com/content/learn/modules/apex_triggers/apex_triggers_intro?trail_id=force_com_dev_beginner

Sendmail is working with "success" in console. But no mail arrives. I tried with two email adresses.