Redefine callout functionality as class in mapus package
Customize callout style

Color orange, placeholder title and subtitle
Add send, share buttons to callout

How to put horizontally under textview?
Appear as blue for onTap added markers
Param test (uncommented) to position button at bottom
Change labels layout to Relative in callout class

This should make it easier to position buuttons
Position subTitleText below titleText
Buttons in position!