Hey Christopher,
I will go over the questions in the same order:
1). Yes, the field that populates promo section accepts HTML; you can insert an email link as follows:
Email us!
Please note that you’ll need to remove all spaces from the above code in order for it to work (I’ve used some becuase otherwise the page will render a ready link instead of plain code ;) You can read more about the “mailto” links e.g. here.
2). It wasn’t envisaged in the admin settings, to avoid leaving an excessive chunk of fixed area that would obstruct the content of the website; however, it can be done via some custom CSS: please add this code at the very bottom of the theme’s main “style.css” file (go to “Appearance -> Editor” and it will be opened by default):
#header-above, .top-line { display: block !important; }
3). Aganin, some additional CSS can help with this one:
#header { background: rgba(0, 0, 0, 0.6) !important; }
You can insert this piece just the same as in 2).
Sincerely,
Andrii / Satori Studio