For chat:-
- Bold Text in Facebook Chat: If you want to write bold text then you would start your text with star '*'and end with'*' for example *Bold Text* will appear Bold Text.
- Underline Text in Facebook Chat: If you want to write underline text then you would start your text with underscore '_' and end with '_' for example _Underline Text_ will appear as Underline Text.
- Bold with Underline Text in Facebook Chat: In this case you would be start your text with star together with underscore '*_' and end with '_*' for example *_Bold with Underline Text_* will appear as Bold with Underline Text.