Insert Empty Measure

I just started using Reflow to convert my handwritten drum charts into something more presentable. I almost finished a simple song when I realized I had accidentally omitted a 2 measure section in the middle. I think I tried all the buttons but could not find a way to insert empty measures in the middle. Is there an easy way to do this?

Nevermind. I just discovered that the Alt button brings up more functions. :roll_eyes: