HTML or other method to add new line, color, italic, bold within a Service's Details fields

I need to add a "new line" character within the Service's Detail field.
All these failed:  multiple returns, <br>, %0a%0d , \n , %&#10;&#13; , {control J pasted from Excel}

I would also like to be able to do italics , bold ,  and color for both the "Service Name" field, the "Description" field, and it'd be nice for the "Custom Fields" too.

I cannot seem to find anyone else asking for this in forums, surprisingly.