subform/table to be scrolled

[Subba560-Gfg7y8]

HI ,

i have a table which have 6 rows by default but when i click the radio button the data will be populated in to subform/table if the data contains more tha 6 values then the table has to be increased but the data must not flowed down. the subform or table must be postion EX:by clicking radio buttons data has  10 rows then i should get the scroll bar at the end of subform/table in order to see all the rows i have to scroll up or down

please let me know how could i do it.

thanks in advance...