Today has more complex layout to achieve in which leads me to learn more about roff/troff (I don't even know the differences for now :p) commands.

More discovery like

• \ immediately follow by newline for multi-line text
• wrap multi-line text inside T{ and T} in which its newline uses .br to achieve multi-line cell in .TS/.TE (table)
• .nf/.fi can be used within T{ and T}