Contents of custom pages

Q1. Is it possible at all to write HTML and/or JSX in the title & content fields of the custom pages?
Q2. If the answer to the question above is no, is there any way to format the text in these fields? 
Q3. and to write URLs on custom pages? 

For Custom Pages, html/jsx are not supported.

For such html/jsx pages, you can use the WebView Menus, under Components >> AppsConda >> Drawer Menu 2.