A good point to start could be:
select the whole table --> rigth click --> Cell Style. On Lettering tab choose the character size best fit for you.
Hi, In the video that you shared has helped me as well.
If the table is going long enough, then NX automatically breaks it into 2 , 3 as suitable. Is there any way in which we can bring all the pieces back to one withour affecting the width of the table?