Enter the chords for those two bars and a chord for the first beat of the next bar (it can be anything as it will be overwritten). Select them. Type R (for Repeat) as many times as necessary. Any notes present will not be affected.
Enter the chords for those two bars and a chord for the first beat of the next bar (it can be anything as it will be overwritten). Select them. Type R (for Repeat) as many times as necessary. Any notes present will not be affected.